Well, maybe you will expirience a problem that Silverlight 2 plugin is not working eventhough you have the latest version 2.0.30825.0
It is showing MIME type: application/x-silverlight-2-b2
This can be if you have old Silverlight 2 Beta version 2.0.10125.0 in bin directory of your website/application.
Just ovewrite it with latest version and it will be ok.
Magic!
