No 5.1 sound on Airtel HD over HDMI

Just got a Denon 1912 yesterday! Connected the Airtel HD DVR through HDMI to the AVR. The problem is that the picture has a pink tint to it! and only stereo sound!

Currently moved to component video and composite Audio! Anyone has faced this problem? the picture is all pink! :( everything else works fine, PS3, HTPC. Even the Denon on screen menu looks okay. If I connect the STB directly to the TV, everything is working.
 
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