Dark Knight digital copy

So I bought the combo Dark Knight movie/ digital copy, with the intent of putting the digital copy on my PSP. I get home, transfer it on, look on my PSP, and it says there's no videos. I plug it back in the computer, and the movie is in the video folder. It is in WMA format, so it should be working. I tryed running it through DVDSHRINK and DVDFAB to convert it to .mp4 format, but Warner Brothers put some new encryption on it so that didn't work. PSP Video 9 didn't work either. Any suggestions?