diff --git a/Customers/Invoices.aspx b/Customers/Invoices.aspx
index 9efe1ab..088f776 100644
--- a/Customers/Invoices.aspx
+++ b/Customers/Invoices.aspx
@@ -110,7 +110,7 @@
                                                                     <form class="myform" id="commentform">
                                                                         <asp:Label ID="lbl_LKWNr" runat="server" Text="LKW Kennzeichen"></asp:Label>
                                                                         <asp:TextBox ID="txt_LKWNr" runat="server" style="width:117px;margin-left:32px"></asp:TextBox>
-                                                                        <asp:RegularExpressionValidator ControlToValidate="txt_LKWNr" runat="server" ID="regexval_txt_LKW" ValidationGroup="additional_TXTs" ValidationExpression="^([A-Z0-9]{30})\d$" Display="Dynamic" ErrorMessage="LKW Kennzeichen: Falsche Eingabe!" SetFocusOnError="true"></asp:RegularExpressionValidator>
+                                                                        <asp:RegularExpressionValidator ControlToValidate="txt_LKWNr" runat="server" ID="regexval_txt_LKW" ValidationGroup="additional_TXTs" ValidationExpression="^[A-Z0-9]{4,30}\d$" Display="Dynamic" ErrorMessage="LKW Kennzeichen: Falsche Eingabe!" SetFocusOnError="true"></asp:RegularExpressionValidator>
                                                                         <asp:Label ID="lbl_KdNrAuftrag" runat="server" Text="Kunden Auftrags Nr" style="margin-left:45px"></asp:Label>
                                                                         <asp:TextBox ID="txt_KdNrAuftrag" runat="server" style="width:117px;margin-left:6px"></asp:TextBox> 
                                                                         <asp:RegularExpressionValidator ControlToValidate="txt_KdNrAuftrag" runat="server" ID="regexval_txt_KdNrAuftrag" ValidationGroup="additional_TXTs" ValidationExpression="^([0-9]{8})$" Display="Dynamic" ErrorMessage="Falsche Eingabe!" SetFocusOnError="true"></asp:RegularExpressionValidator>
@@ -142,7 +142,7 @@
                                                                     <form class="myform_M" id="commentform_4">
                                                                         <asp:Label ID="lbl_LKWNr_M" runat="server" Text="LKW Kennzeichen"></asp:Label>
                                                                         <asp:TextBox ID="txt_LKWNr_M" runat="server" style="width:105px;margin-left:29px"></asp:TextBox>
-                                                                        <asp:RegularExpressionValidator ControlToValidate="txt_LKWNr_M" runat="server" ID="regexval_txt_LKW_M" ValidationGroup="additional_TXTs" ValidationExpression="^([A-Z0-9]{30})\d$" Display="Dynamic" ErrorMessage="LKW Kennzeichen: Falsche Eingabe!" SetFocusOnError="true"></asp:RegularExpressionValidator>
+                                                                        <asp:RegularExpressionValidator ControlToValidate="txt_LKWNr_M" runat="server" ID="regexval_txt_LKW_M" ValidationGroup="additional_TXTs" ValidationExpression="^([A-Z0-9]{5,30})\d$" Display="Dynamic" ErrorMessage="LKW Kennzeichen: Falsche Eingabe!" SetFocusOnError="true"></asp:RegularExpressionValidator>
                                                                         <asp:Label ID="lbl_KdNrAuftrag_M" runat="server" Text="Kunden Auftrags Nr" ></asp:Label>
                                                                         <asp:TextBox ID="txt_KdNrAuftrag_M" runat="server" style="width:105px;margin-left:13px"></asp:TextBox> 
                                                                         <asp:RegularExpressionValidator ControlToValidate="txt_KdNrAuftrag_M" runat="server" ID="regexval_txt_KdNrAuftrag_M" ValidationGroup="additional_TXTs" ValidationExpression="^([0-9]{7})$" Display="Dynamic" ErrorMessage="Falsche Eingabe!" SetFocusOnError="true"></asp:RegularExpressionValidator>
@@ -184,7 +184,7 @@
                                     </div>
                                 </div>
                                            <div id="Abstand_laenger" style="height: /*24px*/ 1.873536299765808vh;"></div> 
-                                <asp:Button ID="Send_Data" class="btn btn-primary" OnClick="Send_Data_Click" runat="server" Text="Erhalte Rechnungen" CausesValidation="false" Autopostback="True" style="font-size:1.33em;width:260px;height:30px;color:#fff" />
+                                <asp:Button ID="btn_Send_Data" class="btn btn-primary" OnClick="btn_Send_Data_Click" runat="server" Text="Erhalte Rechnungen" CausesValidation="false"  style="font-size:1.33em;width:260px;height:30px;color:#fff" />
                                       <div id="Abstand_lang" style="height: /*32px*/ 2.498048399687744vh;"></div> 
                                 <div class="g-3">
                                     <div id="conovertab" style="overflow-x:auto;margin-left:-2px">
diff --git a/Customers/Invoices.aspx.vb b/Customers/Invoices.aspx.vb
index f349323..f99e71d 100644
--- a/Customers/Invoices.aspx.vb
+++ b/Customers/Invoices.aspx.vb
@@ -33,8 +33,8 @@ Partial Class Customers_Invoices
                 normaltable.EnableViewState = True
                 lbl_von.Visible = True
                 lbl_bis.Visible = True
-                valDateRange_1.Enabled = True
-                valDateRange_2.Enabled = True
+                'valDateRange_1.Enabled = True
+                'valDateRange_2.Enabled = True
                 Dim erster = New Date(Now().Year, Now().Month, 1)
                 Dim ersterdat = "1." + Now().Month.ToString + "." + Now().Year.ToString
                 pickdate1.Text = erster.Day.ToString + "." + Now().Month.ToString + "." + Now().Year.ToString
@@ -162,15 +162,15 @@ Partial Class Customers_Invoices
         reNr = ""
     End Sub
 
-    Protected Sub Send_Data_Click(sender As Object, e As EventArgs)
+    Protected Sub btn_Send_Data_Click(sender As Object, e As EventArgs)
         dt = Nothing
         valreq_pickdate1.Validate()
         valreq_pickdate2.Validate()
         If valreq_pickdate1.IsValid And valreq_pickdate2.IsValid And Kdnrtext = Not "" Then
-            valDateRange_1.Validate()
-            valDateRange_2.Validate()
-            If valDateRange_1.IsValid And valDateRange_2.IsValid Then
-                If Not String.IsNullOrEmpty(txt_Absender.Text) Then
+            ' valDateRange_1.Validate()
+            'valDateRange_2.Validate()
+            'If valDateRange_1.IsValid And valDateRange_2.IsValid Then
+            If Not String.IsNullOrEmpty(txt_Absender.Text) Then
                     regexval_txt_Absender.Enabled = True
                     regexval_txt_Absender.Validate()
                     txt_Absender.ValidateRequestMode = UI.ValidateRequestMode.Enabled
@@ -304,13 +304,13 @@ Partial Class Customers_Invoices
                     End Try
                 End If
 
-                'lbl_status.Text=Kdnrtext)
-                If String.IsNullOrEmpty(Kdnrtext) = False And String.IsNullOrEmpty(datevon.ToString) = False And String.IsNullOrEmpty(datebis.ToString) = False Then
-                    dt = VERAG_PROG_ALLGEMEIN.cRechnungsausgang.GET_LIST_WEB(Integer.Parse(Kdnrtext), datevon, datebis, Integer.Parse(reNr), Absender, Empfaenger, LKWNR, KDNAFNR)
-                ElseIf String.IsNullOrEmpty(Kdnrtext) = True Or String.IsNullOrEmpty(datevon.ToString) = True And String.IsNullOrEmpty(datebis.ToString) = True And String.IsNullOrEmpty(reNr) = True And String.IsNullOrEmpty(Absender) = False And String.IsNullOrEmpty(LKWNR) = False And String.IsNullOrEmpty(Empfaenger) = False And String.IsNullOrEmpty(KDNAFNR) = False Then
-
-                    valreq_pickdate1.Validate()
-                    valreq_pickdate2.Validate()
+            'lbl_status.Text = Kdnrtext
+            If String.IsNullOrEmpty(Kdnrtext) = False And String.IsNullOrEmpty(datevon.ToString) = False And String.IsNullOrEmpty(datebis.ToString) = False Then
+                dt = VERAG_PROG_ALLGEMEIN.cRechnungsausgang.GET_LIST_WEB(Integer.Parse(Kdnrtext), datevon, datebis, Integer.Parse(reNr), Absender, Empfaenger, LKWNR, KDNAFNR)
+            ElseIf String.IsNullOrEmpty(Kdnrtext) = True And String.IsNullOrEmpty(datevon.ToString) = True And String.IsNullOrEmpty(datebis.ToString) = True And String.IsNullOrEmpty(reNr) = True And String.IsNullOrEmpty(Absender) = False And String.IsNullOrEmpty(LKWNR) = False And String.IsNullOrEmpty(Empfaenger) = False And String.IsNullOrEmpty(KDNAFNR) = False Then
+                lbl_status.Text = "Bitte alle fehlenden Felder ausfüllen!"
+                valreq_pickdate1.Validate()
+                valreq_pickdate2.Validate()
                 End If
 
                 If dt IsNot Nothing AndAlso Not dt.Count = 0 Then
@@ -380,6 +380,6 @@ Partial Class Customers_Invoices
             Else
                 lbl_status.Text = "Error in valid date room"
             End If
-        End If
+        'End If
     End Sub
 End Class