anyone can help me to fix this?

i get stun in game every 2 sec that make me not moving smothly
https://www.youtube.com/watch?v=VHI0Fcjji58
i make this video to show it

What's your FPS, enable Archtype does it go?

put archetype, all effects to low. you ain't got a very good PC i think so it doesn't run smooth.

Try playing with your max fps (limit to 60, then 250, then unlimited) and see if it helps. Also enable archetype and whitemaos as notorious suggested.

Do yourself a favor

Remove that Jjang.

Attachment 16765
my fps can go up to +200
i tried archetype and white maps and al my effects low but still the same
i even tried another gunz servers and those servers works good without this problem

I am not sure but maybe there is an issue with your DirectX, or Direct 3D drivers.
That may be the case or it could be issues with the threads of those processes.
Maybe you could try using a tool like Process Explorer (from Windows) and try and locate the error.
You might need a new PC?
The only other things which are related that I can think of is some sort of mutex, semaphore or thread concurrency issue that is causing this which relates with what I have mentioned.