I bought an airport extreme time capsule and it worked great except i had a dead spot where my TV is located. So I went out and bought an airport express. It works fine when it's on a wifi connection to the the APE but as soon as i connect it via a home plug it kills the whole network and nothing works . Unplug the cat 5 and everything works fine again. I am connecting the LaN on the APE to a pair of home plugs to the WAN of the base station. If i connect my crappy old Dlink or Linksys routers to the home plug they work fine. Any Ideas??