I have flashed my new WRT54GL with HyperWRT G Thibor15c everything seems to be good with the flash. However I can only seem to get a low signal no matter what I do. When I change the channel the signal will go up to exelent or very good for just a second then back down to low. can anyone point me into the direction of how to set up the router for the best settings or whatever I need to do. thanks.