I presume u mean still images... If so, then this is one of little odd things that TW seems to do with the initial still image. You need to go to the "movie" tab and set a new movie. Make sure this is the default movie and copy and paste ur images and and panos u want into the new movie. Make sure that u set all images to a zoom factor of 815. I don't rightly know what 815 stands for... but it's the figure u want to ensure that ur stills work.
Give it a try and give us a yell if ur having problems with this.
If I only had an hour to chop down a tree... I'd spend 45 mins sharpening the axe.