Not everyone that has viewed this post might know the answer to your question(s). It is usually wiser for people who don't know the topic not
to answer a post, as they may end up doing more harm than help.
Itunes can be very particular about other programs and itself. Itunes "protects" (for lack of a better term) both itself and it's downloaded music by making it difficult to work with other products/programs. I've run into this many times with my son. We eventually stopped using Itunes to download music, as it would only play in Itunes, couldn't be transferred to another drive (or CD), caused problems with his burning software etc. etc. It's how Itunes keeps itself in business IMHO (I'm not a fan of Itunes), and makes it difficult/near impossible to use with other software. This prevents "illegal" copying of files to CD and prevents them from being shared online. This also prevents them from you being able to listen to them in your car, in a portable CD player, downstairs on the stereo system.....the only place that you can listen to Itunes is on something made by Itunes (Ipod, Itunes software on your computer etc.). If you've downloaded the song to your computer and paid for it via Itunes, you should be able to pay an additional .99¢ and be able to copy it to another device (another drive or non Itunes MP3 player) or to a CD (but I believe you can only do this one time).
My best advice is to find another CD burning software that doesn't conflict with Itunes. You can find a lot of free CD burning software HERE
Hope this helps!
War produces veterans, wounded both physically and mentally. They have sacrificed for us.....and it is now our job to help these veterans, as they have already helped us in ways we will never know, in ways that we cannot fathom, and in ways that we take granted every day.