My last post didn't get replied to so I'll try again. Basically me and my friends  play WAW custom zombies over Tunngle Lan on a cracked version of the game. However we can't play together after installing T4M mod because either a Create Online Profile pops up or Server Authentication Failure after trying to load a map. One moderator suggested I put my texture quality on low but that didn't work so we are still trying to figure this out. Any help would be appreciated, thank you.

T4m is only for the 400fx limit fix which doesnt have something to do with internet stuff. Maybe you should try to port forward. Try it also with other people to see if you are causing it or your friend's pc. The problem could be the cracked version.

BTW isn't talking about cracked versions of waw not against the rules of ugx? I'm not sure coz I'm new here