majistikal

Can someone please help me or give me the link to a spot where someone has figured out how to play burned dvd-r's movies that i copied using DVD shrink i have a N4. I have tried it and it says invalid format and then i have to hold the eject button for like 20sec before it will eject??? HELP!!!!! ps sorry if this is a repost i was on here for like a hour looking and couldnt find the answer