Memorex DVD+rw

I bought a Memorex dvd rw drive, installed it and it would copy music files, but never movies. Now the drive won’t even copy music, or files, or anything! I uninstalled it and reinstalled and the same problems! What am I doing wrong and how can I fix it?

How are you trying to copy files/music? What software are you using?
How old is the drive? Have you tried using different DVD’s? Does it read cd’s and dvd’s?
What are your system specs. and os?