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Need help- Dataview row index issue

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I have a datatable to store some values like name, id etc. in ASP.NET
I have scenario where i need to modify more than one records of the
datatable . I am trying to use dataview as below.

If mdviewmodifyGroup.Count > 0 Then
mdviewmodifyGroup.AllowEdit = True

For pintCount = 0 To mdviewmodifyGroup.Count - 1
mdviewmodifyGroup(pintCount)("Name") = txtModifyName.Text
end if

In the for loop, the first record gets updated and then it throws me
following exception.

"Index 1 is not non-negative and below total rows count" ???
I dont understand what i am doing wrong..? I checked the count of
mdviewmodifyGroup.Count and its grater than 1 (usually 2 or 3 in my case)

Please let me know how i can get around this issue..? any help or pointers
inthis will be greatly appreciated.


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