Well, Ahmad ... I have no idea what your data is and this is obviously part of where your problem is ... you need to debug this thing and see what's causing your error.
>Run-time error
>
>>Is this a compile-time error or a run-time error?
>>
>>
>>
>>>Bonnie,
>>>
>>>It raises this error:
>>>Additional information: Can't set the SelectedValue in a ListControl with empty ValueMember.
>>>
>>>In database I don't have any empty row!!
>>>
>>>Sorry Bonnie, but my mind is going out of cavarage area ! :-)