We finally found the error. If you look at the following URL, you'll find it contains a small mistake: | ?WSRPProducer=Application WSRP producer&WSRPPortletHandle=/Application.InboxPortlet&WSRPPortletState=&WSRPRegistrationHandle=11&WSRPRegistrationState=&WSRPMode=wsrp:view&WSRPWindowState=wsrp:normal&WSRPQualifiedName=g_9bcea8ab_df1d_4ced_b0f1_453faf9f2c10&WSRPIsAnonymous=False&WSRPAction=wsrp%5Frewrite%3Fwsrp%2DurlType%3DblockingAction%26amp%3Bwsrp%2DinteractionState%3DJBPNS% | 5F%2Fwsrp%5Frewrite | It contains "%26amp%3B" which is an encoded "&". This happend because when you obtain the render/action url from the PortletResponse, JBoss returns: | wsrp_rewrite?wsrp-urlType=blockingAction&wsrp-interactionState=JBPNS_ | I don't quite understand why the url obtained from the PortletResponse contains an URL that has already escaped the "&", but undoing this escaping by replacing the "&" with just "&" solves the problem. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4203003#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a... _______________________________________________ jboss-user mailing list jboss-user(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/jboss-user