I'm having a very difficult time getting either wireless router to work (i.e. connect to the internet). I've tried my older D-link DI-624 Airplus G and my new Netgear Rangemax Next N router, but both are giving me the same problem. I have a cable modem through Comcast that works fine when I plug it in directly to my computer. However, when I plug the cable modem into the router, it fails to obtain an IP address and doesn't connect to the internet. I can login to the router without any problems and I have tried manually entering all the information (IP address, Subnet, Gateway, DNS servers, etc), but still get no connectivity (although all the lights are functioning and blinking indicating there is connectivity). I have tried switching the cable from the modem to the router from a normal ethernet cable to a crossover cable, same result. I've contacted Comcast and their only support is to make sure the power on sequence is correct (turn everything off, wait two minutes then turn on the cable modem, after it's receiving a signal then turn on router and finally turn on PC). I don't have to enter any login information to access the internet, and Comcast doesn't require a MAC address for the account either. I am able to login to the wireless network that the router provides via my laptop (also running windows XP) as a home network (so it sees my desktop PC with no problems), but it too fails to be able to access the internet. I can ping the router using either the desktop PC or the laptop, but get timeouts when I try pinging an "outside" address. I have reset the router to default settings, and I've tried moving the LAN cable connecting the desktop PC to any of the 4 available ports - all the same unconnected result. I've also ensured that no firewalls are turned on with either computer. Please advise....as I'm at the end of the troubleshooting that I can think of. Thanks in advance for your help!