Display Pier environment as Seaside component

Hi, my goal is to display Pier environment as Seaside subcomponent. I have some problem .... First i create a class: WAComponent subclass: #TestMultiPier instanceVariableNames: 'pageA pageB tabs task' classVariableNames: '' poolDictionaries: '' category: 'DTR-TestPier' the initialize super initialize. tabs := OrderedCollection new. nomeKernel := 'pier'. pageA := PRPierFrame on: (PRContext kernel: (PRKernel instanceNamed: nomeKernel )). self initTopMenuFor the initTopMenuFor tabs add: 'PageA' -> pageA. the renderContentOn: html html text: 'Prova gestione multi Pier istance'. html paragraph: Time now. self renderTopMenuOn: html. task ifNotNil:[ html div id: 'divTabMst'; with:[ html render: task]] the renderTopMenuOn: html html unorderedList id: 'menu'; with: [ tabs do: [ :each | html listItem: [ html anchor class: (task = each value ifTrue: [ 'active' ]); callback: [ task := each value ]; with: each key ] ] ] Now when clic on the PageA link the system rendering the Pier page correctly. The error is erase when i click on sub link ( of the Pier main page ) Information or Environment. The system report the error: UndefinedObject(Object)>>doesNotUnderstand: #context: PRCurrentContext class>>value: [] in PRContext>>activationCallback BlockClosure>>valueWithPossibleArguments: WAActionCallback>>evaluateWithArgument: WAActionCallback(WACallback)>>evaluateWithFieldValues: [] in WACallbackRegistry>>handle: OrderedCollection>>do: WACallbackRegistry>>handle: [] in [] in WAActionPhaseContinuation>>runCallbacks BlockClosure>>on:do: WAActionPhaseContinuation(WARenderLoopContinuation)>>withNotificationHandlerDo: [] in WAActionPhaseContinuation>>runCallbacks BlockClosure>>ensure: WAActionPhaseContinuation>>runCallbacks WAActionPhaseContinuation>>handleRequest [] in WAActionPhaseContinuation(WASessionContinuation)>>basicValue BlockClosure>>on:do: WAActionPhaseContinuation(WASessionContinuation)>>withUnregisteredHandlerDo: WAActionPhaseContinuation(WASessionContinuation)>>basicValue Because this ? Thanks, Dario