Completly Weird Bug/ Glitch

Ok, this weird bug / glitch happens on my private server whenever two people go into a game.

I have AE completly to my friend as normal.

But he gets like 4-10 ping to me, and can see me behind him whenenver he walks, I follow him. Its so weird. I slash when he does, everything. To me im over the other side of the map watching this character with AE above its head.

Screenshot

http://img63.imageshack.us/img63/4271/gunz067vy6.jpg


Ive tried everything to fix the AE.

No IP
Davd Client
Port Forwarding
Client.ini

What else must I do to fix this AE.

I have no firewalls running to block the server from communicating with other players.

tell him to forward port 7777
P.S. If you guys are using the same router, then u cant have just port 7777, add port 7778
because when u have 2 people using the same router and playing gunz at same time, one of the port would be taken.