Error 134 on Cataclysm.. How do i fix it??

Hello guys. I've been having this problem for 2 days and couldn't do anything about it. Nothing worked. So i decided to ask for help here..
I downloaded Cataclysm from here and extracted it, everything was fine. But when i start the game a window pops up with a message "Error #134 (0x85100086) Fatal condition".
And i really don't know how to fix that. I saw that this is a common error, but nowhere how to fix it. Looking in the forums for somekind of solution, but nothing has worked yet :(
Please, tell me how to fix this error 134 if you know. I want to play the game with my friends, but this problem is holding me down.. :(
Thanks in advance

Generally the most efficient way to sort out these issues it to redownload the client. Try with the minimal client:
http://forum.warmane.com/showthread....staller-(18MB)