DVD's won't play on DVD player

I am using the pioneer A05, with Nero 5.5.9.9, to burn just the main movie onto pioneer media. So far the dvds seem okay but they won't play on my dvd player, which is a LG dvd player. can anyone tell me what the problem is, whether it's the software, the media or maybe just the dvd player won't play burnt dvd's. any suggestions are appreciated.

First off go and look here and see if your player is compatible Also what are you using to burn the discs?

Do not use nero.I burnt my first dvd great played on computer ok played on my mates cyberhome dvd, mine no.I found this info. It is NOT recommended to use Nero. Tests have revealed that Nero does not make 100% compliant DVD-video disks, and numerous DVD players will not play disks made with Nero. We have had good results with RecordNow by Veritas and PrimoDVD by Prassi. i thought it was media incompatibility.so i burnt the dvd again using recordnow max and hey presto worked a treat.