Exception when attempted to run MVC Music Store after including SampleData.cs in Model
===

I am getting an exception when I attempt to run MVC Music Store app listed in http://mvcmusicstore.codeplex.com/releases/view/64379 . As soon as I included SampleData.cs in Models folder and make some changes to include this model, I get an ArgumentException, Illegal characters in path. Any similar experiences?  Can someone help in resolving this as I am stuck with this for a while now. 

thanks