the WMV files are coded as 720p, they start to play on the Directv HR21 but choppy then just fails back to the menu after 1 minute or so..tested in WIndows media player and the stream is fine? I have Mezzmo running in a VM on windows 2008 with 4 cpu's assigned and 4GB ram..but I watched the resources and never fo about 50%..as well as it streams fine to a windows media PC...