I have noticed that since I installed my new cd-r/rw drive this week with buffer underrun, I cannot test or test and burn a cd.
It just goes to burn automatically. Is this because of the buffer
underrun technology. My previous drive did not have this so I could test and burn a cd. Is this normal for Nero 5.5

You need to check www.nero.com for latest update version. Do you already have 5.5.7.2?