Help with Madden 08 and The Simpsons Game

Hello, has anyone else had the following problems. I am trying to get the simpsons game and madden 08 on my psp. i have already put ricky ponting, sonic and fifastreet on so i know it works, but for some reason i cannot get these games to transfer over from computer to psp keeps saying it cant find the file even though it is downloaded 100%