looking at the source of your results page, you have detached it from the template that was using originally.
the links on the side menu populate the main content area using javascript.
the script uses the Main Content editable region:
<div id="content">
<!-- InstanceBeginEditable name="MainContent" -->
.........
<!-- InstanceEndEditable -->
</div>
to know where to place the results that are returned from the links.
since the editable region has been removed, the script cannot find the region to show the results.