From the ping test it looks like WZC is enabled before getting the drivers just to see if this fix's your problem goto Start - Run - services.msc
Goto Wireless Zero Configuration right click stop
Then try the game see if that helps at all after that id just try uninstalling the drivers and getting the latest ones from linksys make a shortcut to WMP54G to your desktop and run that when you wanna connect to the internet inless the program automatically starts for you
Its not wireless satellite type, but i use a wireless router on a home connection, thats direct cable. Also, the only firewall i have is the XP SP 2 one.