JSF - Pagination implementation using Tomahawk - jsf

Question

I am trying to implement Pagination in JSF using Tomahawk. When the page is loaded, the table in the first page is populated with data. But, when I click on Next or Prev the table is empty. I don't see any javascript error in the browser. Following is the code from the jsp. Please let me know if I am missing something:
<t:dataTable id="tableid" value="#{SiteSearchCriteria.siteList}"
var="item" border="1" rows="5" rowIndexVar="rowIndex"
rowClasses="trobg1,trobg2">
<h:column>
<f:facet name="header">
<h:outputText value="siteName"></h:outputText>
</f:facet>
<h:outputLabel value="#{item.siteName}"></h:outputLabel>
</h:column>
<h:column>
<f:facet name="header">
<h:outputText value="siteCLLI"></h:outputText>
</f:facet>
<h:outputLabel value="#{item.siteCLLI}"></h:outputLabel>
</h:column>
</t:dataTable>
<t:dataScroller id="dataScrollerId" for="tableid" fastStep="10"
pageIndexVar="pageIndex" renderFacetsIfSinglePage="true"
pageCountVar="pageCount" paginator="true" paginatorMaxPages="9"
immediate="true">
<f:facet name="first">
<t:outputText value="First"></t:outputText>
</f:facet>
<f:facet name="last">
<t:outputText value="Last"></t:outputText>
</f:facet>
<f:facet name="previous">
<t:outputText value="Previous"></t:outputText>
</f:facet>
<f:facet name="next">
<t:outputText value="Next"></t:outputText>
</f:facet>
</t:dataScroller>

Answer 1

The backing bean that I was using was in "request" scope. Hence, the data was not visible when I clicked on "Next". Changed the scope of backing bean to "Session" and things started to work.