Audio cuts off when burning to CD

Hello Heroes!

We are working on a presentation that is about 9 minutes long. Each slide has audio, and it auto-advances. The preview works fine, but when we burn to a CD, the audio cuts off at the end of each slide and looses the sync of the animations. We tried it in a USB drive and works fine - it's just the CD burning process that is making the audio cut off. Any pointers will be greatly appreciated!

Thanks!