Ew. Try using real software like ahead nero. If you dont want to pay for it there are other ways of obtatining it, but thats up to you.
What was the source for your burned disc? Was it a backup of a retail disc? If so you might want to try DVDSHRINK for recreating a single layer disc instead of NTI's internal stuff.
Even with all of that said, its likely that your dvd player doesnt like the +R discs. Try it in a different player.