There are 3 different X2 Premium models. All 3 models have gone thru several firmwares updates. Some updates were released toward the help of scanning TPs including combinations of SD & Mpeg4 mixed. The very original X2 premium One has numerous bugs, followed by the second released with blue lights which most of the bugs were taken care and now III. We worked to fix the original firmware release for the III which was having problems scanning SD/Mpeg4 combinations in the PR/VI mux on 99W.