Me and my friend have been trying to LAN Q4 all afternoon but we keep getting the same error when connecting to each other, "could not load def.swq4dm1.def" I even get this when trying to connect on the internet. Any solutions?

Does anyone still duel with the CPMA mod online? I was just wondering because whenever I look for a list of servers I get nothing. Btw I'm new to the forums and have been a long time Quake fan and have just started playing Q3 again.