Type load error when trying to host an ASP.NET web app with IIS 7

Hi There,

I'm trying to host an ASP.NET web app on a brand-new Windows Server 2008 VM with IIS 7. I deployed the app, converted it to an application in IIS. However, when I try to view the app, I got the following server error in the application:

Could not load type 'System.ServiceModel.Activation.HttpModule' from assembly 'System.ServiceModel, Version=3.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'.

What do I need to do to fix this error? I could provide the exception stack trace if needed.

Thanks,

Jay