I wish I could tell you how I did it. I use mynet to stream from my Windows 7 laptop to my Transformer. All my videos play. Most are DVDs copied to mp4 using DVD Catalyst, a few are Kodak Zi6 video camera videos, some in Zi6 (Quick Time?) and some converted to mp4 with DVD Catalyst. Someone way smarter than me can probably nail your issue quickly. File format would be the first thing I check, though.