Hi i just bought a dbox which was already programmed (or so i thought) It has the sportster software. When i start it up and do a scan on bruteforce i get 133 channels. The listings are all there and info but i get no sound or picture. I only get sound and picture on rte2 tv3 channel 6 and setanta. I don't know a lot about imaging or any off the technical data... anyonegot anyviewss/help??