when my portlet start my console write a message :
"Can't find TLD for location [http://java.sun.com/jsp/jstl/core]. JAR containing the TLD may not be in the classpath"
When extension of my navigtation is .jspx and press the button anything happend.
But when extension of my navigation is . iface and press the button the message is rewritte, but only the first time i press the button.