I think I might know the problem. Have you set the file type ".rpl" default program as toribash? If not, then go to start, default programs, associate a file type with a program, find ".rpl", click browse, find tb/toribash and now you should be able to watch other people's replays if you haven't already done this. If you have done this already, try doing it again, maybe it was messed up somehow.