StackTrace at at System.Windows.Forms.Control.CreateHandle()

I'm getting the following exception:

   at System.Windows.Forms.Control.CreateHandle()
   at System.Windows.Forms.Control.CreateControl(Boolean fIgnoreVisible)
   at System.Windows.Forms.Control.CreateControl(Boolean fIgnoreVisible)
   at System.Windows.Forms.Control.CreateControl(Boolean fIgnoreVisible)
   at System.Windows.Forms.Control.CreateControl(Boolean fIgnoreVisible)
   at System.Windows.Forms.Control.CreateControl()
   at System.Windows.Forms.Form.SetVisibleCore(Boolean value)
   at System.Windows.Forms.Control.Show()
   at IMI.Module.ControlLibrary.Forms.MDIParent.ShowForm(Form form) in

Any ideas why this might be happening? It runs locally fine, but not on Citrix.