I have a half mile network setup using a WRT54G and a WAP54G. Has been working great for over a year. Now my down slowed to 100kbps and my upload is still over 400kbps. The up and down use to be 400-600kbps. If I take my laptop near the WRT54G signal all is well. Also the computer that is solid wired to the WRT54G works fine. When I ping the WRT54G through the WAP I get no lost packets. Is there some way to check the signal strength at the WAP54G? What else should I check?