cluetip - What am I missing?

cluetip - What am I missing?

I'm missing something about cluetip (or plugins in general -- jquery newbee here).
Why doesn't the following code pop up the cluetip?
<%@ Language=VBScript %>
<% option explicit   
response.buffer=true   
response.expires=0%>
<script type="text/javascript" src="/scripts/jQuery.min.js"></script>
<script type="text/javascript" src="/scripts/jQuery.cluetip.js"></script>
<script type="text/javascript">
$(document).ready(function(){         
   //Setup cluetips for the keyword descriptions      
   $('a.tips').cluetip();
  });
});
</script>
<link rel="stylesheet" type="text/css" href="/Config/jquery.cluetip.css">
<table>
<tr>
<TD width='275'>
<INPUT TYPE="CHECKBOX" NAME='VOCAB_1' VALUE='606' >
<a class="tips" rel="/index.aspx?sec=kwd&id=606">Data Interoperability and Standards (IHE)</a>
</TD>   
</tr>
</table>