I have had a WRT54GS successfully running on a home network for a few years. I canâ€™t find a version number on it and I seem to recall that I bought it shortly after they were introduced. I have two old wired pcâ€™s and one old wireless Sony Viao successfully running on the router. The WRT54GS is set up to use WPA-PSK with TKIP and no SSID broadcast. My friend was given a new Thinkpad for his new job and told to set up a high-speed connection at his house. Before the cable connection was set up at his house he brought the Thinkpad to my house and we quickly set him up to access my wireless router using WPA-PSK. He returned a few more times to access the router with no problems. He was authorized by his employer to purchase a router and I recommended a WRT54GS. The new router (WRT54GS Version 6) was in place when the Comcast tech came out to set up his cable connection. The installation went flawlessly and he was able to access the Internet both in a wired mode through the router and in a wireless mode as well â€“ thus proving the wired and wireless functions were working on the router. After the Comcast tech left we attempted to set up WPA-PSK. I have done this set-up on a few systems besides my own and it has always been successful. This time it has been a complete failure. The Thinkpad is able to connect to the WPA-PSK set up at my house on the OLD router but unable to connect using WPA-PSK at my friendâ€™s house on the NEW router. If we shut off the WPA at my friendâ€™s house the router connects just fine. Weâ€™ve also used the Thinkpad to connect to a few other unsecured wireless routers. The Thinkpad seems to be working just fine â€“ it has no issues on my wireless WPA-PSK set-up. The problem seems to be with the BRAND NEW WRT54GS Version 6 router (firmware v1.50.6, Feb 17, 2006). By the way, both routers are unmodified except for the required set up as recommended by Linksys. I see that a number of others have had WPA issues but I canâ€™t find any success stories on how to resolve them - just a lot of suggestions - mostly for using 3rd party software which I would prefer to avoid. Anyone have any success solving this issue?