Scrollable Data Table doesn't seem to work for me <HELP!>

[roykachouh]

I am trying to use the scrollable data table, i have taken the sample code from richfaces demo site. But the table doesn't appear to extract the data from the list. What am I doing wrong here?

<rich:tab label="System Identifiers">
 <rich:scrollableDataTable height="200px" width="500px" id="carList" rows="20"
 value="#{API.cpmDashboard.systemIdentifierList}" var="systemID">

 <rich:column id="systemName">
 <f:facet name="header"><h:outputText value="System ID Name" /></f:facet>
 <h:outputText value="#{systemID.systemName}" />
 </rich:column>
 <rich:column id="systemId">
 <f:facet name="header"><h:outputText styleClass="headerText" value="System ID Value" /></f:facet>
 <h:outputText value="#{systemID.systemName}" />
 </rich:column>
 </rich:scrollableDataTable>
 </rich:tab>