Why won't my document save to my CD?

It could be your disk is full or if you saved the same document once before with the same name, it won't let you resave unless you rename the second document. Try saving the file with a new name. To check the CD to see if it is full right click on the CD icon> Scroll down and select Properties. You should see information telling you how much space you have used and how much space remains on the CD.