Arg_ComException

[Don]

Hi i am using Silverlight GridView i have the following Issue with that

i am using GridViewDataColumn in grid its editable, issue is that as i delete or edit text in GridViewDataColumn on focus out its throws exception
(Arg_ComException)
following events i am using

1. grdcsvData_SelectedCellsChanging
2. grdcsvData_CellEditEnded
3. grdcsvData_Deleting
4. grdcsvData_CellLoaded
5. grdcsvData_CurrentCellChanged
6. grdcsvData_DataLoaded

i debug application but no exception found in debugging can any body help me whats the problme is

Thanks