Blank rows apear in GridView

[PunjabiSingh]

Hi Telerik
i am having issue with RadGridView most of time it works fine but some times when i load gridview it comes with blank rows the number of rows are same as my datatable row count but there is no data in rows

im using datatable to loop grid and add each row one by one

example
RadGridView.Rows.Clear()

for i=0 to dtTable.rows.count-1
    RadGridView.Rows.AddNew()
    RadGridView.Rows(i).Cells(1).Value ="<value>"
    ..
next

now most of time it works fine but some time it just shows me blank rows with no data
i was using Q2 2009 now i have updated with Q3 2009 but still same problem

help me please thanks

Kind Regards:
Harinder Singh