Request for the permission of type 'System.Security.Permissions.UIPermission, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed." (System.Security.SecurityException) + any one know why_

Hi I have WPF application using VS2010 ultimate, what i have found this issuse comes unfrequently, when i run my application on Window XP SP3.

just want to share more information , my all project developed in 3.5 framework. and i gave partial full trust and check Enable Click Once Security.

any one have any clue.

Thanks