I had the same problem only my error says "EIRR client has failed to launch"
This is a seperate issue, which usually indicated missing DirectX (web installer), .net or XNA 2.0 dependencies not being installed correctly (or at all).
There is a seperate thread here dealing with the issue, read through it, and post a new thread if it does not resolve your issue:
http://forums.europeinruins.com/index.php?topic=2500.0