DataView UPdate Error

[wackyphill]

I loop thru a Filtered DataView and update several of the rows in the
loop. The problem is once a ropw gets altered the DataView's Count
Seems to be altered causing me to access rows that it doesn't think
exist:

DataView runView = new DataView( _db.DS.Tables["task"], where, null,
DataViewRowState.CurrentRows);

foreach( DataRowView row in runView )
{
freq = (int)row["freq"];
row["runTime"] = dt;
}
I keep getting this error the first time I try to read from the row:

There is no row at position 2.
at System.Data.DataView.GetRecord(Int32 recordIndex)
at System.Data.DataView.IsOriginalVersion(Int32 index)
at System.Data.DataRowView.get_Item(String property)
at ScheduleManager.MainFrm.timer_Tick(Object sender, EventArgs e) in
c:\documents and
settings\csaloio\desktop\schedulemanager\mainfrm.c s:line 692
How are you supposed to do it?