I have checked all the forums, chatrooms etc, and still have not found any relief to my connection problem. I bought a Datel LAN Adapter for the Wii (I know, not the best, but...). I have a Linksys WRT54G with the 4.21.1 firmware loaded and a Motorola Cable Modem. After lots of attempts, I finally got down to connection without the router, and it worked. I was able to update the Wii and do all the stuff that makes that a cool thing to do. However, when I tried to get the router back into the picture (lots of other stuff already using the internet), I could no longer get the Wii to access. It gives me the 50420 error code and happily ignores me. I have tried all the variations of unplug, reboot, etc to no avail. It does not appear that it even gets an IP address from DHCP, but hard setting the IP and DNS doesn't work either. I know there has to be someone out there using a similar if not identical setup, since it was one of the most popular routers sold, and nowadays the Datel is what most of the retailers are selling. Anyone have any new ideas???