My web browser gives me an error message when I try to view a presentation.
Be sure that you have Adobe Flash installed on your computer. Click on the link to download and install it. 98% of all computers already have it installed.

The presentation pauses frequently while playing.
You either have a slow Internet connection, or there is too much traffic on your local network. Try again later when traffic may have reduced.

I don't seem to be looking at the correct page.
Your computer may have cached some of the old pages. You may need to refresh your page, especially if you've been to the site before.