navigation header image rollovers

[gabenn2]

hopefully this will make sense, I am trying to create a navigation header that has image rollovers for the links. This site has an example of what I am talking about. This is the site that I am working on. Everything works except the secondary images don't show up on rollover. Thanks in advance for any help that you can give me :)

[kobra]

Try looking at this module in the downloads/other section Categories Rollover and see how this is accomplished