I hooked up my HD TiVo several days ago and everything worked great but now I'm having HDCP problems.

I originally connected the TiVo to my Vizio TV with a HDMI cable. It worked fine for several days but today the TiVo started displaying a message saying that the TV doesn't support HDCP and there's no video.

Hooking up component video cables "solved" the problem, but why did HDMI connection work for a while and then stop?

I'd prefer to use HDMI cables, is there anyway to resolve this problem?

TIA ...