When the AVR front panel displays DD PLII, it means it is only receiving a stereo signal. In addition to ensuring the cable box has Dolby Digital enabled, you must also select a HD channel that is broadcasting a DD 5.1 signal as generally only about 1/2 of them do.
For more helpful information, review posts #3-6 in the 2013 Denon AVR E/X Owner's thread ....
http://www.avsforum.com/t/1465528/the-official-2013-denon-e-series-x-series-avr-model-owners-thread-faq#post_23134210
For more helpful information, review posts #3-6 in the 2013 Denon AVR E/X Owner's thread ....
http://www.avsforum.com/t/1465528/the-official-2013-denon-e-series-x-series-avr-model-owners-thread-faq#post_23134210