I have a grid inside a warp panel that needs to have the header styles conditionally changed on a postback.  I can do whatever I want with the on the initial page load, but on a postback none of the changes are seen on the client side.  Below is a snippet of code that demonstrates the style settings on a postback.

For i As Integer = 0 To myGrid.Columns.Count - 1
    With myGrid.Columns(i).Header
       .Style.Font.Bold = True
       .Style.Font.Size = 8
       .Style.ForeColor = Drawing.Color.White
    End With
Next

I have also tried to use a css style which also has no effect.