I live in zip code 61080 (IL), but I would like to receive the local channels from the Detroit area. I got DIRECTV to change my service address to my parents', which is in Detroit (zip 48076). So, now the local channels (ABC, NBC, etc) from Detroit appear in my channel guide, but I only get "searching for signal" message when those channels are selected. The national signals, like Fox Sports Detroit, are working. Is there a way for me to pick up the Detroit local channel signal from my current location? Possibly a second dish aimed correctly? Any help would be appreciated!