Im using Zyxel Prestige 600HW-61 for my router. My ps3 is connected in wired connection. When im playing in fifa 09 online mode, it often says that i lost connection to the ea servers, then the match which i was playing stopped. Although, i have to sign in again and it takes quite a while that i can play the next match. When "searching for opponent", sometimes it says lost connection again. Does anyone know how to fix this problem. Do i have to open the "port" or "nat" thing? If yes how to do it? Please give me a step by step guide
Thank you so much to those who try to help me

Computers & Internet - Zyxel - Prestige 600WH Wireless Router (91-004-164001)