dynamic tree node in richfaces with ajax

[hamidreza maghbooli]

hi everyone
I'm a beginner in richfaces and I need some help.
I wanna make a tree which its TreeNode s (leaves) are added incrementaly by clicking on them with ajax technology.
I used this code but I didn't see any reply
<rich:tree style="width:300px" value="#{yegan.tree}" binding="#{yegan.htmlTree}" var="item" >
<rich:treeNode changeExpandListener="#{yegan.changed}">
<h:outputText value="#{item.name}"/>
</rich:treeNode>
</rich:tree>
I would be very thankful to you
thanks and regards
Hamidreza Maghbooli