Nero 6303

Wonder if anybodys got an idea about this.

I can burn cd’s no problem.
I try to burn a dvd, nero says it is burning but when it had finished, it hasn’t burnt anything onto the disc.
It is not the media as i’ve tried with another piece of software and they burn fine.

Nero used to work fine but since i’ve formatted drive and re-installed software, i get the above problem.

Any help please

Anyone got any ideas please!!!