AIW 128 No picture in tv overlay



AIW 128 w/32mb - Tv starts, Auto scan finds no channels but I do get good audio from the channels when I select them manually, just no picture. I'm using antenna ( no cable out here in the sticks ) and was wondering if the signal needs to be boosted for the tuner. Downloaded the newest drivers from ATI, changed display properties and settings but no help. I tried connecting to a vcr and playing a tape, but still no picture.
Any Ideas? Thanks,

Tyan Trinity S1590, K6-3/400, 128mb, Dell 1726.