I'm trying to create my own language service in Visual Studio 2008 SP1, but when I run the program (which starts the Visual Studio Experimental Hive) and try to open a source file, I get this error:

Any ideas how to fix it? (I already tried uninstalling and reinstalling VS, it didn't work. :( )

Update

It turns out this was due to a poor uninstallation of Spec#. I cleaned it up, but now the issue is that my language service doesn't actually highlight anything... I imagined this to be the cause, but seeing as how I still get the error and how it was irrelevant, I don't know what the problem is.

I'm using the default lexer/parser files with the default tokens, so I'd imagine there would be some sort of highlighting for my file types, but there isn't... any thoughts?

Never mind, it seems like it's working correctly:

if (x == 0)
{
}

is not even correct C code in the first place!

I was looking for syntax highlighting but I needed to set it up first, and it seems like it's working now.