CD-Recordable Kits - FAQs
All files and documentation are offered on an *AS IS* basis and you assume full responsibility for using them.
Problems recording audio CDs 
Audio discs can only be recorded in a single session (that is, you must 
record in one sitting). 

Once you have recorded a CD audio track, and written the table of contents, 
tracks can no longer be added to the disc.  

The same rule applies to mixed-mode CDs.