Weird affiliate link config issue


I’m trying to set up graphic banners. Overall, it went fine, except when I actually go to click on the banner (i.e. when I visit the link that the javascript creates). The link takes me to a page that lists my categories, and then lists a plaintext version of the category description (which are supposed to be displayed in HTML) ! I just want the link to take me to the home page.

Any help would be greatly appreciated.