Please can ssomeone help me with this as i have yet to play a complete round in any multiplayer mode!

i can connect up fine but after a minute, usually less. I get kicked from the server (any server).

Whats strange is it says my nat type is moderate, now thats not the case.
Im using a static IP which has also been put into a DMZ state, windows firewall is off along with my AV firewall.
Also my routers firewall is switched off.

PLEASE SOMEONE HELP!!!!!