Flex Grid Scrollbars Value Won't Change

I am trying to determine the value of the scrollbars property so that I know how wide make the last column in my Flex Grid.  The problem is that it doesn't matter how wide or long the data is in the grid, the value of .scrollbars is always 3 (both Hor. and Ver.).  I have tested it where the grid is filled with a single row of data that extends about half way accross the control but the .scrollbars property still returns 3?  Anybody have any ideas why the grid isn't recognizing that Hor or Vert scrollbars are not needed?

Here's my code:

    Select Case .ScrollBars
        Case 0 'No Scrollbars
            If ColWidth < ((.Width * 20) - 100) Then
                .ColWidth(.Cols - 1) = (.Width * 20) - ColWidth - 100
            End If
        Case 1 'Only Horizontal
            'Do Nothing
        Case 2 'Only Vervical
            If ColWidth < ((.Width * 20) - 360) Then
                .ColWidth(.Cols - 1) = (.Width * 20) - ColWidth - 360
            End If
        Case 3 'Both Horizontal and Vertical
            If ColWidth < ((.Width * 20) - 360) Then
                .ColWidth(.Cols - 1) = (.Width * 20) - ColWidth - 360
            End If
    End Select

Thanks so much,
Kyle