Is it not possible to use Logical Functions in force.com sites?

I have a visual force page that is displayed as a public site. The page has an If Statement that shows a list of record names if they are of a certain type. This works great when viewing the page as a visualforce page logged into the org.

However when viewing as a public site, i don't get an error, i simply do not get the list returned as if the 'If Statement' is conflicting with the public page.

I tried adding the apex java script pages to the visual force page. But still no go.

<apex:page standardController="Course__c" recordSetVar="course" showHeader="false" standardStylesheets="false" >
<apex:includeScript value="http://cs1.salesforce.com/soap/ajax/17.0/connection.js"/>
<apex:includeScript value="http://cs1.salesforce.com/soap/ajax/17.0/apex.js"/>
<apex:includeScript value="http://cs1.salesforce.com/static/121310/js/functions.js"/>
<apex:includeScript value="http://cs1.salesforce.com/jslibrary/1309972098000/JiffyStubs.js"/>

<h2>Classroom Courses</h2>

<apex:repeat value="{!course}" var="c">
  <apex:outputText rendered="{!IF(contains(c.Classroom_Type__c, 'Classroom'),'true','false')}"><p class="style1"><a href="http://cs1.force.com/coursedescription?Id={!c.Id}"><apex:outputField value="{!c.Name}"/></a></p></apex:outputText>
  
</apex:repeat>

<dl class="st_text_1 indent_box"><dd>&nbsp;</dd><dd><h3 class="style2">Online Courses</h3></dd></dl>
<apex:repeat value="{!course}" var="c">
  <apex:outputText rendered="{!IF(contains(c.Classroom_Type__c, 'Web'),'true','false')}"><p class="style1"><a href="http://cs1.force.com/coursedescription?Id={!c.Id}"><apex:outputField value="{!c.Name}"/></a></p></apex:outputText>
</apex:repeat>

</apex:page>

 Any ideas?

Thanks for your help.