Are you getting a message to Encode/Encode ALL/Use/Use ALL.

It may be that you burned a previous slideshow with less pictures in it. I would recommend to try deleting your disc images folder.

Make sure the MAGIX software is closed.

Go to your Computer - Documents folder. In there, will be a folder for your affected product, double click on that.

In there will be a folder called Disk Images. Delete any files that are in here (they are all temporary files).

This should resolve the problem.

If not then I would advise to create a ticket with Support.

http://support2.magix.net/customer/en/magix_contact