Well, I have find out about the error, I just had to dld UT3 2.1 patch, and now it works, but a new problem:
When I'm trying to join to a server, I click Join, and it sends me to the game menu, where its said that something is downloading, but soon this message vanishes and idk what to do now, I was waiting for dld finishes for 20 min, but Idk did it finished and was that a dld, lol, so Idk, maybe I need to dld some update for Ren X?