WPF loads slowly on logon and switch user when launched from custom Credential Provider

Hi there,

I have a custom credential provider that spawns a WPF window in order to do custom authentication.  When I run the WPF application from Visual Studio 2010 or standalone, it opens in 2-3 seconds.  When I Lock my computer, it loads the WPF application in 2-3 seconds.  However, when I do switch user, it takes around 30 seconds to load the WPF window.  It also takes this long on logon.

I'm completely stuck here.  I have the same problem as the user from this thread, but the reply marked as answer was not helpful at all, unfortunately.

http://social.msdn.microsoft.com/forums/en-us/wpf/thread/2E7081CB-F5D4-479F-86D2-7AC6F445FBF4

Thanks,

Ken

kanno41