Strange error when attempting to debug an ASP .NET MVC solution in IIS 7

Question

I have an ASP .NET project, which I usually work on my workstation at my current employers workplace.
I've had to stay home a couple of days, but wanted to keep working on my project nevertheless. In theory, this shouldn't be a problem. My client uses TFS, and I can access it through the internet. 

I checked out a copy of the solution, started working on it, but whenever I want to test it (run the app in debug mode using IIS 7) I get the following error:




I've tried everything, including creating a new solution, but even then I get the same error. I do have IIS 7.5 express installed as well, I can debug there, however there I get problems with my web services.

I'm also not the only one working on the solution, I would prefer not to change any setting which would affect my colleagues.

There are some differences off course. The project is usually worked on on a workstation running Windows 7, @ home I use Windows Server 2008 R2. Could this be part of the problem?

Any ideas?