I had the same problem and this allowed me to fix it.
However, I now get this error on the update page - the file does upload.
Microsoft VBScript runtime error '800a01b6'
Object doesn't support this property or method
/beta/concentric-ncc/_admin/community_Update.asp, line 49
This is Line 49
WA_where_fieldValuesStr = "" & cStr(cStr(WA_DFP_UploadObj("WADAUpdateRecordID"))) & ""