Tree2 and Websphere Portal 5

[POUSSE Sebastien]

I used successfully the tree2 component with Jetspeed 2, using the  
org.apache.myfaces.portlet.MyFacesGenericPortlet portlet-class.

I recently switched to Websphere Portal Server 5, but the container 
throws a ClassCastException...
I think the problem is that Websphere portlets must subclass the 
PortletAdapter class.

Is there any chance to use the tree2 component in WebSphere ?

Thanks.