Can anyone think of why Me.grdMain.NavigateData(mmNavigate.Last) would fail? It just doesn't move the grid to the last record. I don't get any errors out or anything.

I have a parent child relation ship with a form and a user control. The parent is on the form and I made a user control that has all the child controls for the child object on it. I have a new button on it that adds a row to the grid and child biz object via a
bizUserDepartment.NewRow(New UserDepartmentDefaults)
call.
This works and adds a new row, but it isn't selected in the grid. I called NavigateData to move it to the last row, which is the new one, but it doesn't work. Focus stays on the first row in the grid.