problem copying download onto 3 CD’s

I have downloaded an audio book that I wanted to then copy onto a CD. I am using Windows Media Player (system is Windows XP by the way). It would require (3) 80 minute CD’s to hold this file. Problem is, when I hit “Copy To CD” – it says “File Won’t Fit” and won’t continue. I looked everywhere for a way to be able to do this.

any ideas ?? ( sorry for rush – we are leaving for overseas on Sunday and I really wanted to have this book for the trip)

Would much appreciate any input/ideas

Cheers

Kay