Delta Force Xtreme DEMO

When I play DFX Demo online, nobody else on my home network can get online.

I also find that when I close down game, even I cannot access internet
unless I "reset the modem" from within the modem settings via a browser.


Win XP Pro on gaming computer (Cat 5e)
Vista Basic on laptop (Wireless)
Belkin Wireless G Router
Westell 2200 DSL Modem

Any ideas?