close,open, edit save show again in webbrowser

a click button on a form will 'close' the webbrowser open the excel form behind the scene edit it ,save and show again on the webbrowser... however i receive this error : "xxx.xls already exist in this location.Do you want to save it..."
when i try to debug it line by line (ie.F8 on this click button) there is no error till the end of the sub!....(the problem lies on the .save statement... wat wnet wrong ....dunnno which object has not close properly...:(

VB Code:

Dim name1
 
Private Sub Command1_Click()
        With Me.CommonDialog1
                .DialogTitle = "Select Office Document to Display"
                .Filter = "Excel Documents " & _
            "(*.xls)|*.xls|"
                .ShowOpen
        
        If .FileName <> "" Then
            name1 = .FileName
            Me.WebBrowser1.Navigate .FileName
         End If
        End With
    
End Sub
 
Private Sub Command2_Click()
Me.WebBrowser1.Navigate "about:blank"
 
Dim wat As Excel.Application
Set wat = CreateObject("Excel.Application")
 
wat.Workbooks.Open FileName:="C:\123.xls"
 
Range("G9:G10").Select
wat.ActiveSheet.Pictures.Insert( _
        "C:\sig.bmp").Select
        
wat.ActiveWorkbook.Save
wat.Quit
Set wat = Nothing
 
WebBrowser1.Navigate name1
 
      
End Sub
 
Private Sub Form_Load()
WebBrowser1.Navigate "about:blank"
 
End Sub