HelpCan't shoot?

Hey,
I play dayz on no cd-key servers and when I try to shoot the bullet goes somewhere else.
I mean when I shoot on the wall the bullet hit the floor, Already treid to create new profile and reset settings and the game no idea what causing this never happend to me before.

someone can help me? thanks

It may be related to ping, although I've never heard of something like this before.

Hmmm this is strange does it work on single player? if no then i would try re installing the game