Dvd slideshow

Please help!! I burned photos to a dvd and burned it using nero. It says I have 43 pics in the slideshow and will play as a slide show from the file.
However, when I play the actual dvd, all i get is the cover picture and the audio. It won’t move along even if I hit the forward arrow. What is wrong? :confused:

I thought that Ulead had a program for this, Picture show: