I am having problems trying to use these fields inside a BrowseDialog control. I can select the fields to be searched, but when I try to search on one of those fields, I get the following error:

KeyNotFoundException
 The given key was not present in the dictionary.

Source     : mscorlib

Stack Trace:
   at System.ThrowHelper.ThrowKeyNotFoundException()
   at System.Collections.Generic.Dictionary`2.get_Item(TKey key)
   at MicroFour.StrataFrame.UI.Windows.Forms.BrowseDialogWindow.BuildWhereElement(Int32 ParameterIndex)
   at MicroFour.StrataFrame.UI.Windows.Forms.BrowseDialogWindow.BuildSearchWhereClause()
   at MicroFour.StrataFrame.UI.Windows.Forms.BrowseDialogWindow.Search()
   at MicroFour.StrataFrame.UI.Windows.Forms.BrowseDialogWindow.ExecuteSearch()
   at MicroFour.StrataFrame.UI.Windows.Forms.BrowseDialogSearchToolStrip.cmdSearch_Click(Object sender, EventArgs e)
   at System.Windows.Forms.ToolStripItem.RaiseEvent(Object key, EventArgs e)
   at System.Windows.Forms.ToolStripButton.OnClick(EventArgs e)
   at System.Windows.Forms.ToolStripItem.HandleClick(EventArgs e)
   at System.Windows.Forms.ToolStripItem.HandleMouseUp(MouseEventArgs e)
   at System.Windows.Forms.ToolStripItem.FireEventInteractive(EventArgs e, ToolStripItemEventType met)
   at System.Windows.Forms.ToolStripItem.FireEvent(EventArgs e, ToolStripItemEventType met)
   at System.Windows.Forms.ToolStrip.OnMouseUp(MouseEventArgs mea)
   at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
   at System.Windows.Forms.Control.WndProc(Message& m)
   at System.Windows.Forms.ScrollableControl.WndProc(Message& m)
   at System.Windows.Forms.ToolStrip.WndProc(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
   at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

Do I need to add something to the BO to allow custom fields to be searched?

Thanks!