In my asp.net app, I used an htmlInput control to upload either Excel, Access or text files. Both Excel and text file

types work, but not Access file type. I got error message saying Can't find server or DNS error.

If I don't click on the Browse button of the control, the app works fine. It doesn't work if I click on it. I guess that

means it's not a permission issue.

Code:
Try
                txtUpload.PostedFile.SaveAs(sFullPath)
                lblErrorMessage.Text = "Upload of File " & sFile & " to " & sFullPath & " succeeded"
                uploadSuccessed = True
            Catch Ex As Exception
                lblErrorMessage.Text = "Upload of File " & sFile & " to " & sFullPath & " failed for the following reason:

" & Ex.Message
                uploadSuccessed = False
            Finally
                lblErrorMessage.Font.Bold = True
                lblErrorMessage.Visible = True
            End Try

Thanks for your help!