"Failed to create process: The stub received bad data"

[DanGBCT]

I am trying to "get" source code from Team Foundation Server with the following command in Visual Build Pro:

"C:\Program Files\Microsoft Visual Studio 10.0\Common7\IDE\tf.exe" Get /noprompt /login:<domainname\username>, <password in asterisks>, /recursive $\<files to retrieve>

and I received the message:
"Failed to create process: The stub received bad data".

Has anyone come across this problem and know of what is causing it.

Thanks.

Specifics:

Visual Build Pro 7.7
Windows 7 (32-bit)
Visual Studio 2010 Ultimate Ed
logged in as user with Admin priviledges (user is part of Adminintrator group)
user is part of a domain
user is authorized to access TFS

Let me know if there is more info needed that I missed.