Hi,

When run our application and we could get following exception some times, could you please have a look at this?

System.Security.SecurityException: Request for the permission of type 'System.Security.Permissions.UIPermission, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed.
   at System.Security.CodeAccessSecurityEngine.ThrowSecurityException(Assembly asm, PermissionSet granted, PermissionSet refused, RuntimeMethodHandle rmh, SecurityAction action, Object demand, IPermission permThatFailed)
   at System.Security.CodeAccessSecurityEngine.ThrowSecurityException(Object assemblyOrString, PermissionSet granted, PermissionSet refused, RuntimeMethodHandle rmh, SecurityAction action, Object demand, IPermission permThatFailed)
   at System.Security.CodeAccessSecurityEngine.CheckHelper(PermissionSet grantedSet, PermissionSet refusedSet, CodeAccessPermission demand, PermissionToken permToken, RuntimeMethodHandle rmh, Object assemblyOrString, SecurityAction action, Boolean throwException)
   at System.Security.CodeAccessSecurityEngine.CheckHelper(CompressedStack cs, PermissionSet grantedSet, PermissionSet refusedSet, CodeAccessPermission demand, PermissionToken permToken, RuntimeMethodHandle rmh, Assembly asm, SecurityAction action)
   at System.Security.CodeAccessSecurityEngine.Check(Object demand, StackCrawlMark& stackMark, Boolean isPermSet)
   at System.Security.CodeAccessPermission.Demand()
   at System.Windows.Forms.Control.get_Parent()
   at Infragistics.Win.IGPanel.PaintTransparentBackground(Graphics g, Rectangle clipRectangle)
   at Infragistics.Win.Misc.UltraExpandableGroupBoxPanel.PaintBackground(PaintEventArgs e)
   at Infragistics.Win.Misc.UltraExpandableGroupBoxPanel.OnPaintBackground(PaintEventArgs e)
   at System.Windows.Forms.Control.PaintTransparentBackground(PaintEventArgs e, Rectangle rectangle, Region transparentRegion)
   at System.Windows.Forms.Control.PaintBackground(PaintEventArgs e, Rectangle rectangle, Color backColor, Point scrollOffset)
   at System.Windows.Forms.Control.PaintBackground(PaintEventArgs e, Rectangle rectangle)
   at System.Windows.Forms.Control.OnPaintBackground(PaintEventArgs pevent)
   at System.Windows.Forms.ScrollableControl.OnPaintBackground(PaintEventArgs e)
   at System.Windows.Forms.Control.PaintWithErrorHandling(PaintEventArgs e, Int16 layer, Boolean disposeEventArgs)
   at System.Windows.Forms.Control.WmEraseBkgnd(Message& m)
   at System.Windows.Forms.Control.WndProc(Message& m)
   at System.Windows.Forms.ScrollableControl.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)
The action that failed was:
Demand
The type of the first permission that failed was:
System.Security.Permissions.UIPermission