I've had to read your post several times in order to work out what you're asking.
I've come to the conclusion that "the difficulty" is adding CDs to your iTunes Library, but you don't say why. What happens when you try to add a CD, at which point does the procedure go wrong?
When you insert CD into your CD drive. Does it:
- show in the IMPORT CD window
- play the CD
- ask if you wish to import the CD
- import the CD without asking?
Alternatively, does the CD icon appear at the top of the iTunes window, but nothing else happens?

Note that when a CD is put into your CD drive, the CD present icon will also appear at the top of the iTunes window, even if you are in the main music library view. You can recognise the Import CD window by the two buttons: 1. CD Info and 2. Import CD.