tree2 component retains its state after session invaldation

I am using tree2 component as navigator in my application. The code is as follows:

<t:tree2 id="navMenu"

value="#{NavigationTreeHandler.expandedTreeData}"

binding="#{NavigationTreeHandler.tree}"

var="node"

varNodeToggler="t"

showLines="false"

showNav="false"

showRootNode="false"

preserveToggle="false"

clientSideToggle="false">

The tree works absolutely fine , but it persists its state even after the session has ended. When a new user logs in , instead of initially showing all the nodes collapsed the tree appears in the same state as the previous user had left it. How can I solve this. Need your help urgently

[696 byte] By [pooja2909a] at [2007-10-3 2:33:36]