CF client error 18

skunkfu12984

Please help have a bit of a problem.OK here it is,I start to play the game and it goes fine than this error pops up(CF client error 18,have a screen shot if that helps)the game freeze for a 10-20 seconds and then return me back to lobby with score back to 0.I thought to reinstall the game but when I talked to my friends they sad that they hawe the same problem(not frequently as me)the problem started a couple of weeks ago.Dont know if that is related but from yesterday I dont have map in the game as well.PLS throw any sugestions.
TY in advance.
(sry for bed English)