Scroller Problem

I have a block on my site ( that should show new stock in a scroller. If I’ve got the site open in customization mode the scroller is there - as soon as I sign out of the site there’s no scroller. I can’t see or find any reason for this. Anyone got any ideas?

I've found a related problem - when I'm signed out of the site the 'view larger image' on the products page doesn't work either - I'm assuming this is javaScript and that the login popup box which also isn't working is javascript. So JavaScript not working when I'm signed out of the site - any ideas how to fix this - your help would be appreaciated.