To re-enable AutoPlay (if you want to) - go to "My Computer," right-click the drive you want, select "properties," and click on the "auto play" tab. Then use the pull-down menu to select "music files," "music CD," etc, and make sure that each is set to "prompt me each time to choose an action."
..as for your problem...do you use the Nero Express program or the full blown Nero app?
In the meantime, here's a small app that will burn both CD's and DVD's:
http://kiaplayer.narod.ru/files/powe....0_exe_ENG.zip