You can convert the MPEG-2 file to MPEG-1 using something like TMPGenc. I think
http://www.vcdhelp.com has guides on doing this. Expect quality to suffer quite a bit on doing a MPEG-2 to MPEG-1 conversion. Your real problem may be that your player doesn't like your media. Trying CD-RW discs or another brand of CD-R might help. It's impossible to say what brand of CD-R might work better as all players seem to be a little different and what works well in one model doesn't work so well in another.