Weird Error With Append Query.

Hey guys (again :o)

I've encountered another weird error when applying an append query through a button. Here's the code:

Private Sub cmdSaveChanges_Click()

On Error GoTo Err_cmdSaveChanges_Click
'Saves the new Inspector information into the information table.
'Adds the two references created by adding a new inspector into the XREF_FILE_INSPECTOR table.
'This is the case that the references are formed by adding a completely new inspector.
If (IsNull(cmbInspector) Or Me.cmbInspector = "") Then

'Saves Inspector information
DoCmd.DoMenuItem acFormBar, acRecordsMenu, acSaveRecord, , acMenuVer70
'Adds references
DoCmd.RunSQL "INSERT INTO XREF_FILE_INSPECTOR" _
& "(FILE_NUMBER_CD, INSPECTOR_NUMBER_CD) VALUES " _
& "(" & [Forms]![GeneralFile].[txtGeneralFileNumber] & "," & [Forms]![AddInspector].[txtInspectorNumber] & ");"


Else
'This is the case where the user chooses an inspector from the provided combo box.
DoCmd.RunSQL "INSERT INTO XREF_FILE_INSPECTOR " _
& "(FILE_NUMBER_CD, INSPECTOR_NUMBER_CD) VALUES " _
& "(" & [Forms]![GeneralFile].[txtGeneralFileNumber] & "," & cmbInspector.Column(0) & " );"
End If
Exit_cmdSaveChanges_Click:
Exit Sub

Err_cmdSaveChanges_Click:
MsgBox Err.Description
Resume Exit_cmdSaveChanges_Click
End Sub

The problem is, when I run this I get a "Syntax error in INSERT INTO statement". This seems to only be the case for the first part of the IF statement, as the second part's append query works fine.

Help!