ASP.Net 2.0 Web application cannot find specified module.

Question

Recently my ASP.NET application quit working.

1. It is local to my machine. It quit working after installing and uninstalling some third party developer tools. (I believe)
2. I emptied out my directory and started adding modules until I narrowed it down to a managed C++ dll.
3. When I load the dll into Dependency Walker it says that "c:\windows\winsxs\x86_microsoft.vc80.debugcrt_1fc8b3b9a1e18e3b_8.0.50727.762_x-ww_5490cd9f\MSVCM80D.DLL" loads fine, but "MSVCR80D.DLL" could not be found. However this dll exists in the same directory.
4. The managed dll contains an embedded manifest and I am using Visual Studio 2005 service pack 1.
5. I have completely rebuilt the dll in question.
6. We have a normal managed application and the dll loads fine into it.