I've been using premier pro 2.0 to edit some footage. I've finished now and want to export it to an ISO file, but when I bring up the export to ISO dialog, the Burn button remains greyed out/disabled even if I fill all the fields in. I thought it might be because I hadn't rendered all the clips/images, but I've done that and still no joy. Anyone have some experience with this and can give me a clue?