DaleSC

i have been trying to get fox with ota antenna with no success. i can get cbs out of savannah ga. they do broadcast some programs in hd. i can not get any signal from fox. i do beleive that their is a fox affiliate in charleston sc that broacast in hd. does anyone have any suggestions on how i can get fox. i currently have a old antenna with elements missing (appears to look like a vu 190) with a direct tv hr20 hd dvr with a 60" LG plasma flat panel hdtv, i did try a new rs vu90 antenna (which iam stuck with rs say's no returns on antennas) and could not recieve any channels at all. i do have my old antenna mounted about 6 foot above the roof. i also have a 25 foot tower and a rotator going up this weekend. i am wondering if i should buy a different antenna for the tower and possibly a amp. my zip code is 29907..i believe the tramitters in charleston sc and savannah ga are about 70 miles away. any help would be greatly appreciated.

DaleSC