Could not download Silverlight application. Does not appear to be MIME type issue

I am having a problem with a Silverlight control inside an ASP.NET MVC3 page. The silverlight control works on one of my views but on another page I get the following error:

Error: Unhandled Error in Silverlight Application 
Code: 2104    
Category: InitializeError       
Message: Could not download the Silverlight application. Check web server settings     

Everything that I've read says that it's a MIME type error, but the type is registere开发者_如何学运维d and the control works on another page. The test pages work as well. I'm kind of stuck. Has anyone seen this or have other suggestions?

Thanks in advance.

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Load up fiddler and see whats going on in the request. That's the first step and may make it obvious.