I have a new LAN setup using a WRT54G v3.0 router, and a WMP54g adaptor. I am running the 4.00.6 firmware, and the lastest drivers. Signal strength is great, -50 dbm with no interference. Everything works, as long as no security/encryption is enabled. Once I turn on WEP, my upload speed dives and latency skyrockets. Open, I'll have upload rates af 300+ k/sec. With WEP, it'll drop to about 5 k/sec. An additional clue: I am unable to get any other encryption to work. WEP-128 and WPA both will connect, but will disconnect me after about 5 seconds. Suggestions?