I've been trying to convert some of my video files using "GSP Movie Converter for PSP and iPod" but every time I try I get an error message saying "The the source filter for this file could not be loaded." What does this mean? I've tried converting numerous videos (all mp4 format which is supposed to be compatible with this program...I've done it before on a different computer), but I always get the same message. I've seen similar posts with Windows Media Player having this error message, but not with this program. Any ideas??