I can't connect to WISP using WRT54GS v2.0 in client mode! Wireless ISP use MAC filtering, and I gave them wrt router MAC address (is it wrong???). WISP also has DHCP server. My SSID is same as WISP's. I'm using the same WRT to connect to the other WISP without MAC filtering, but with WPA encryption and everything works fine. Firmware on WRT: Alchemy-6.0-RC5a v3.01.3.8sv My WRT: Status -> Router -> MAC Address -> xx:xx:xx:C8:7E:9E Status -> Local Network -> MAC Address -> xx:xx:xx:C8:7E:9D Status -> Wireless -> MAC Address -> xx:xx:xx:C8:7E:9F ISP has xx:xx:xx:C8:7E:9E WRT can associate with ISP AP, but he can't get IP address from his DHCP server.