Infragistic UltraGrid Data Source Hang

using (WinCEsDataContext context = new WinCEsDataContext())
{

context.Log = Console.Out;
var q = from i in context.TenderResults select i;
ultraGrid1.DisplayLayout.MaxBandDepth = 1;
ultraGrid1.DataSource=q;
}

If you don't set to 1 your application will hang. cause it will try to create new band to all it childs