After editing making a video, and try to upload to Facebook, an error message states I dont have permission to upload, and the program stops, anyone know why? thanks
I don't know the definitive answer to your question but nearly all video editing programs that offer "automatic uploading" to websites like YouTube, Facebook etc., at some time suffer this problem: basically, the "host", Facebook in your case, makes changes to its upload procedure such that the sending program, MEP in your case, can no longer connect correctly, or rather in the manner that the host requires.
I don't use Facebook so can't advise how to do this but the usual advice is to export your movie from MEP and then look at FB's own site for its own uploading facility.