I MS Office 2003 I created a slide show with music to document my granddaughters early years and did so without any problems.

Today, in MS 2007, I am trying to do a similar presentation to for my in-laws (my wife's sister & husband) 50th wedding anniversary. I have all the slides lined up, the sound clip plays fine yet, the presentation will not advance from slide-to-slide (45 slides total). It stays on the 1st slide and does not move. I have read/listened to many instruction guides offered by MS but have yet to solve my problem.

I would appreciate any input offered. Thanks.