Buildspace/tf.exe helped needed

Question

We're currently using Visual Basic 2010 and TFS 2008. I created a buildspace, but can't get the build to map to it:

ALICE_3_;SuperUser (What I want)
ALICE_3_;Intern (What I have)

Is it possible to change users or even 'SourcesDirectory'? Or do I need to log into the SuperUser account?

Thanks