"NEW POST" Icons not showing, plz help

About the Icons that should show in front of every "forum" or threat posted in my forum wich should show if there is anything new in it, i dont see any icons at all :o( here is the link to my forum: well actually only on 2 of the about 10 "forums" i got in there has icons, the rest nothing, how can i make those icons apear, you know the ones that change colour or somthing everytime something new is posted, plz chek and help :o(

http://ataforum.bigforumpro.com/index.htm