I have a CHS 335HDC box that I am attempting to use with an HDMI over Cat6 Extender from Atlona (AT-HD4-V110SR). All I get is a blue screen on my TV, and the box works fine when connected directly to the TV. All of my other HDCP compliant devices work fine with the extender (PS3, Xbox360, DVD player) but it appears that the HDCP implementation on the FiOS box is different than others, and I can not get it to work at all with this equipment. This is standard commercial HDMI extension equipment. It is absolutely ridiculous that a cable box would be incompatible.
Are there other cable boxes that would work? Is there a firmware update for the CHS 335HDC that would fix this HDCP implementation? If this isn't the case, I will most likely need to use a much more expensive solution like an HDSync device, or cancel my whole-home DVR service and just use something like Tivo.