When i try to get into a public WaW zombies room my screen get stuck in the loading screen and don't let me play zombies. I realised that the only maps that have this problem is the original maps of WaW (Natch Der Untoten, Zombie Verrückt, Shi No Numa and Der Reise), because I can play with mods like spongebob, etc...
same as the rest of maps.