imovie

hi there, i have been using imovie for a while now and recently tried to open the programme when an error appeared saying that imovie has unexpectedly quit? i tried opening it as a guest on a different profile and the same thing came up, i also attempted to remove the plist files from library> preferences, but when i tried opening imovie they reappeared and the same message came up again. Please help me, i need this programme to work urgently

Do you have your original install disk? If you do, completely remove iMovie and reinstall it from your OS X disk. You will need a special program to extract iMovie from the disk. You didn't mention anything at all about your Mac or which version of OS X it's using, but you will need Pacifist to extract iMovie.