I have a WRT54G V4 with Thibor 15C. I recently purchased a WMP54GS card used. I downloaded the latest drivers from Linksys. The router sits about 20 ft away from the computer so I have excellent signal strength. I have WPA2 enabled with AES. I have the Speedbooster option enabled in the windows driver and Afterburner set to enabled on the router. However when I run the wl Afterburner command through the Run Command option, it returns a value of 0 meaning speedbooster isn't active. Turning Afterburner on and off doesn't have any affect. The signal is stable and performs normally either way. I've searched through the forums and have tried turning Mixed Mode on but no change either. Thibor 15C was flashed from Tofu. Does it make any difference if I flash to DD-WRT mini generic and then to 15C??