The winners for summer MOTS are D-ead7Dog, toonanimals317, and Telluric! Congratulations!
it works on single player as xrubyx said....
I looked at your exception again and I know how to fix it.What does it say inside your plugins.cfg file in the IT folder?
Actually, I just found a thread to that problem, ArcticWarrior.http://v3impressivetitle.proboards.com/index.cgi?board=gamehelp&action=display&thread=15