Excel Exception...only on one computer?[RESOLVED]

[brendalisalowe]

Hello. This code give me an error, but only on one computer. It works fine on other computers, except the Account Managers computer...fun huh? Maybe it is an Excel setting on her computer?

If sfd.ShowDialog = DialogResult.OK Then
            strExcelFile = sfd.FileName
            xlWBook.SaveAs(strExcelFile) 'LINE 1188
        Else
            Exit Sub
        End If

Here is the error:

System.NullReferenceException: Object reference not set to an instance of an object.
at Excel.WorkbookClass.SaveAs(Object Filename, Object FileFormat, Object Password, Object WriteResPassword, Object ReadOnlyRecommended, Object CreateBackup, XlSaveAsAccessMode AccessMode, Object ConflictResolution, Object AddToMru, Object TextCodepage, Object TextVisualLayout, Object Local)
at AZShower.frmIncomeExcel.btnExportToExcel_Click(Object sender, EventArgs e) in C:\VB.NET\AZShower\Accounting\frmIncomeExcel.vb:line 1188

Thanks for your time!