Cannot drop tracks in Nero Express

Hi all

I’m trying to copy a cd for the first time. I have Nero Express 5.5.10.47 that came with the Exact CD-R/RW Drive. The problem is that I cannot drop any tracks from a CD. There is no error message, the tracks just don’t appear in Nero.

I tried the Add button, I tried dragging/dropping from windows explorer, and I tried different CDs but the result is always the same. I must be missing something very basic, since I did not get any relevant hits on google…

Appreciate any help.

thanks
lidia