Digital Workshop

Hi all
I'm running a very simple pub- one page with a looping slideshow. After a couple of hours the pub freezes.
When I run it with task manger on top it shows the pagefile (starting at about 600mb) increases by a couple of MBs each time the slide rolls on...
is this to be expected and how can I refresh it ?
thanks in advance
Mac
edit: Its not a slideshow, its multiframe, because it needs to show image captions. It has 5 individual frames.

sadly I can't work out how to deal with this so I've pulled the publication and replaced it with a screen with some animated transitions which uses a timeline to loop to page one.
The pagefile does not seem to accumulate when I do it this way...