I can see the arrows but they don't do anything. In Opera and Mozilla it is just one very long line of thumbnails.
The colours of the arrows are dependant on the MSTheme that you are using - is it possible to edit the theme? If not then you could go to the theme css - tech1011.css and manually edit it. I can't make out which of the navbuttons listed in the css that the page is using. If you work it out you could substitute other arrows.
I don't know anything about MS Themes but in other WYSIWYGs it is possible to edit the theme so give that a go first.