HELP – Slideshow Add Music To Video Review

I just downloaded this app and have all my pictures uploaded but it will not let me add any music. I paid for the full version of this. When I click on the music that is already in the app it won’t let me select anything or even play the sample of the music. When I click on the iTunes tab nothing even comes up..
Review by nattylynn92 on Slideshow Add Music To Video.