I have a SC-HT520 DVD player also called SA-HT520. Brought it in England but now we live in OZ. Somehow we got it to work in region 4 don't quite know how though. But now it is going a bit mad it will only play some R4 discsbefore it played them all. It plays older ones normally but it did play the incredibles. Also the sound goes out of time to the picture sometimes. Is there anyone that can explain why and is there anything that we can do to make it work correctly.