Not sure if anyone is still monitoring this thread, but I'll try here first
I'm having the same error "Map failed to start. The server is busy". I just copied my old CoH install back to my live machine, downloaded the I24 Beta and the latest version of Icon. I've never had a previous version of icon installed.
Don't get me wrong, having the character creator is awesome, but i would dearly love to actually get back in for screen shots and "play" with the various maps.
I've tried with the "-n" and "-r" switches with identical results. My version.ini says "Version=2400.201208211101.1". Would appreciate any and all assistance. And even if it never works for me, a thousand thank you's for getting me this far.