Ahh, I didn't anticipate issues with making MP3s into audio CDs. I thought it was pretty much a given feature these days. I know I can do it with Windows Media Player, but I find it a pain to do it right. I seem to use Easy CD-DA Extractor for all of my basic music functions these days, burning included.

One possible issue may by the total time if you try to burn all tracks. It's a little over 79 minutes. It's not an issue for me since I got Sony blank media at Costco. Their 80-minute CDs are actually right at 80 minutes, as opposed to whatever other brand I was using before that claimed 80 minutes but seemed to have wildly varying (okay, maybe not wildly, but certainly a lot sloppier than these Sony discs) amounts of space from one disc to the next, usually under 80 minutes. So maybe whatever discs you're using don't actually have the required amount of space? Just a thought.