Error in form while using dwgthumbnail.ocx

[tito]

I am trying to use "dwgthumbnail.ocx" to show a thumbnail of an AutoCAD
drawing in a form.

The form has a text box (DwgFilename) with a valid drawing name and
path.
When I open the form I get a thumbnail preview of the drawing for the
first
record but as soon as I go to the next record I get the following
error:

Update or CancelUpdate without AddNew or Edit. (Error 3020)

Here is the code:

Private Sub DwgThumbnail2_Updated(Code As Integer)
On Error Resume Next
With DwgThumbnail2
.DwgFileName = [DwgFilename]
.Refresh
End With
End Sub

Any suggestions?
Thanks in advance
/Tito Salazar