Possibly need a Firmware Update
Sorry about that. I did some checking on your problem, and pardon me while I ask the obvious: have you checked to make sure you're on the most recent firmware? You can do that here: http://www.samsung.com/us/support/SupportOwnersFAQPopup.do?faq_id=FAQ00000236&fm_seq=404
If that fixes it, great! Please let me know if it doesn't.
-- HD Tech