What if there is an error writing to disc?

I have tried to finalize my dvd through finalize, but it gives me an error writing to disc. How do I get the contents to a new disc prior to finalizing.

I have tried to put the dvd into my computer, but it says there is nothing on the disc.

I can see all 5 titles on the dvd when it is in the player, but it will not allow me to finalize.

How do I get the contents onto another disc so I can finalize it.... help....