I have a Droid X, and am unable to watch most types of video files, either streaming or downloaded. I am able to view .wmvs, but can't view any .mpg, .3gp or .mp4 files. Do I need a special player to be able to view these kinds of files? If I try to play a .mpg that I have downloaded, I get a message that says "Error - File cannot be displayed of played." Any suggestions? Thanks!