Unable to debug WCF RIA application after security update

After my system did its update last night I am unable to start the debugger for my Silverlight WCF RIA project. I receive the following message: "Unable to start debugging on the web server. IIS does not list a web site that matches the launched URL". If I swtich to the VS Development Server then I can debug the code.

Last night, the system wwas working just fine. Has anyone else run into this issue? Checking the update log a .Net security update is listed.

I am running VS 2010/Windows 7/IIS 7.5 - 开发者_JS百科all up to date

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