problems with WiFi

[ghersh]

Ok, this is a strange one for any experts out there. I've got a wireless network at home (Linksys WRT54GS). The router is in my basement. I've got a Wireless Range Expander (WRE54G) on the main level of the house. My wife's laptop connects just fine to the network no matter where she is in the house. With my new Mogul, it seems like it will only connect thru the router, and not the Range Expander. I tested this by trying to connect to the WiFi from upstairs (too far from the router) and it will not see the network. However, if I am in the basement, it works just fine. I know the Range Expander is working, because I can connect to it wirelessley from the basement (going to the IP address of the Range Expander). Is there -anything- that would be different about the Range Expander that would let a laptop w/ wireless card connect to it with no problem, but keep the Mogul from connecting to it? WPA, MAC filter, channel, shared key, etc. is all configured correctly.

Any help and/or ideas are greatly appreciated.

Greg