Bug in all my char

the bug im taking about is running bug. i just open my acc..test all my char,they all running forward like hell. already try relog, restart client,change keyboard,still the same. the char only stop moving when i press enter to chat and press S. another problem is i cant walk backwards because of this and cant pvp properly. any suggestion and advise is very much welcome.
my IGN: Thinkless
race: asmo
server: siel

 

try repairing your client
it will update it to 2.7.0.2 but you can downgrade it using this guide
http/forum.gameznetwork.com/f64/%5Bguide%5Ddowngrade-2-7-0-2-2-7-0-1-a-114633/