I have an old (2001?) Sharp Vision 64 LHP 4000. Just installed UVerse and cannot receive HD programming. It worked fine with Time Warner and I can plug in xBox and it still works at 1080i. I wasn't able to get anything other than a shoulder shrug and "I guess it doesn't work with your TV" from the AT&T service rep. Has anyone had any similar problems with Uverse? Is there a reason why I can watch HD 1080i programming from other sources, but not Uverse? Thanks,