I have a 30GB iPod Video; I recently purchased a Dynex iPod Docking Station with Remote (DX-IPDR). When I connect the AV input to my TV, the sound works fine, but I don't get the video. What could be the possible problems? I tried it on three different TV's. Do you need a HD TV? The only reason I purchased it was to watch the videos on my TV; the Best Buy saleperson said it would work fine. Thanks!