Behaviour of the little navigation thumbnails beneath the Slider

I've set up a new home-page (www.photo-imaginations.com) My visitors now reported, that they stumbled with the navigation, when the clicked on the little navigation thumbnails beneath the Slider. Indeed I think they should immediatelly open the particular subpage, but on my site, clicking on them just makes the slider stop and one has to click on the button "read more" to really open the particular subpage. Any chance to link those thumbnails directly to their page? Thanks a lot for your help. Harald