Connect Nano 4th Gen to Sony TDM-iP10

I have a Sony home theater system that came with the TDM-iP10 for connecting iPods to the system. My 4th Gen Nano came with the plastic adapter that fits perfectly into TDM-iP10, and when connected, it will play all audio files. However, when I set "TV Out" to "ON" I get the message, "Please Connect to Video Accessory". The Sony system is the DAV-HDX576WF. I have chatted with Sony tech support, but they were unable to solve the problem, and suggested I try Apple support. Has anyone successfully used the TDM-iP10 with a 4th gen Nano?