How are you connected to the 4500? Wired or Wireless? You can should be able to set up the router and gamefuel settings listed in the Game and Gamefuel sticky at the top of this forum page. See if you can get your PS3 up as 1st priority and the xbox down the line, say 50 or 100. Even try 250 is the max I think. Highest priority is 1 and lowest is 250. Review those settings and see how it goes.