If it works in the default style, then it must have been removed from the custom style and so you need to add the code back into there. If you can't get a hold of the designer, you will have to do it yourself. To find the template to modify (and the one to copy the code from), do this - vboptions > General Settings > Add Template Name in HTML Comments > set to Yes . Then go back to your page and view the source code and you will see the name of the template called around your part of the code. (Sometimes the template is the one mentioned at the very top of the page source.)
Oh course, make a copy of your template before you modify it just in case you goof!