Suddenly Nero doesn't recognize DVD-R

Today suddenly, without any new installation (I really can’t remember anything new), Nero 6 sees my Verbatim DVD-R as DVD-ROM and ask a right support, for example when i try to burn a new DVD(ISO) Compilation.
I installed Nero 7, same problem.
I tried to make an ISO image with UltraISO and burn it with Alcohol, and it works, so i suppose is not related to the DVD writer but to Nero itself.

Could someone help me to solve this?
Is it possible that installing a newer version of Alcohol, winXP got troubles?

Welcome to CDF evil;

Try to restore your system to few ago that might resolve your problem.

eheh unfortunately system restore didn’t help, so the problem should be older… :\