Account lost! Need help.

Hi guys
Last week I played Crossfire with my account. [S*T]obi (http://clan.z8games.com/charstat_cf.aspx?usn=4288344)
Suddenly another player logged in .. and I cant login after restart the game. Anybody changed password. -.- I cant login here, too. I didnt give the ID or password to anyone!
I hope you can help me.

greets tobi