auto pause signal?

I have downloaded photos onto a CD-RW disc and when I play it on my Sony CD/DVD player (model DVP-NS30) the playback stops automatically. The trouble shooting guide says "While playing discs with an auto pause signal, the player stops playback at the auto pause signal." How did the auto pause signal get on to the disc? How do I get round this problem? The TV used is a Panasonic.