I am getting the error "This movie can be played only on displays that support HDCP" when attempting to play a HD movie from iTunes to my TV. The TV is a Samsung UN46B7000WF w/resolution 1080p

Hello Apple Community,

I am getting the message "THis movie can be played only on displays that support HDCP (High-bandwidth Digital Content Protection)." This is the first time I have tried to watch a HD movie that I bought from iTunes from my iMac to my TV. (This is also the first attempt to go from my iMac to my TV.) I have a Samsung LED tv that says it is HDCP compatible with Full HD (1080p) and Native resolution is 1920X1080. I bought a Rocketfish Thunderbolt to/Mini Displayport to HDMI adapter (says support is up to 1920X1200 video resolution) and Mediabridge ULTRA Series HDMI Cable (35 Feet) - High-Speed Supports Ethernet, 3D and Audio Return category 2 certified (supports resolution up to 4K including 1440p, 1080p, 1080i and lower).

I can get the iMac to display on my TV but am guessing that I have not managed the settings correctly in Display for either the iMac or the TV. In addition, I do not have sound yet. Although, the card from Mediabridge says that I need to update my drivers. Any help/advice with the settings for iMac to TV to watch in HD and adding HDMI drivers would be greatly appreciated.

Thank you in advance for your assistance.

Sincerely,

Lisa