Dvd copy issue

everytime I attempt to copy some dvd files to a dvd, I get to the copy screen and I am greeted with ‘please enter a dvd-r/rw etc’ and then my dvdrw ejects out the disc, the discs are fine and i’ve tried different types. I’ve tried different versions of nero as well (7 atm).

I don’t know what the problem is, but i am unable to burn any files ;// <noob alert!>

any input?