hey. ive got a question about burning dvds. i have several programs for converting and burning dvds. i mostly use convertxtodvd, dvd shrink and dvd decrypter. i recently purchased a panasonic home theater system, the sc-pt660. i burned off a dvd, which consisted of vob, bup, and ifo files, using dvd shrink and decrypter. it played perfectly. i burned off another dvd, which still consisted of vob, bup, and ifo files and also burned it in dvd shrink and dvd decrypter. this dvd will not play. i do not understand what is wrong because i burned the two dvds the exact same way. any help is greatly appreciated! thankssss!