Just to clarify, why is it you're running both an ethernet cable AND a wireless connection to the same system/router combo?
I have DSL through AT&T. My computer is a Compaq, about 4 years old. Windows XP. I currently use a 2Wire 1000SW for wireless with a Linksys Wireless-G PCI Adapter. This setup does not require ethernet cable. I tried to upgrade to a 2Wire 2701, which does require an ethernet cable and it won't connect. Although I set up the new connection with the SSID and WEP, my system will not recognize the new connection (ie display it in View Available Wireless Networks) in order to connect. When I disconnected the 2701 and reconnected the 1000SW, a third 2wire came up that I had never set up. However after rebooting the 1000SW connection came up and I could reconnect to the internet.
So here is my question. AT&T technical help said the problem was that my wireless adapter, the Linksys, was not working. Which is obviously ridiculous as it is working right now. Therefore, since the only difference in the 2Wire boxes is the Ethernet cable, is it possible that the problem is the Ethernet card? According to my specs, my system has a VIA RHine II Fast Ethernet adapter, driver 126.96.36.1996. Do I just need to upgrade this adapter with a newer driver or get the adapter AT&T recommends, the 10 Bast-T NIC card?