I have a JSP page with inputText and a4j:support:
<a4j:support event="onblur"
action="#{keyFeature.keyParameter.dnTextBoxChanged }"
reRender="cPanel" />

cPanel is a panelGroup, which has some inputText(s), here is one of them:
<h:inputText ... value="#{keyFeature.keyParameter.selectedFirstName }"></h:inputText>

I am changing the value of selectedFirstName in dnTextBoxChanged method. And it is changed - I can see it during debugging.
But cPanel is not reRendered.

How can I debig reRendering? I set breakpoints on getters and setters for selectedFirstName. They stoped at the following phases:

getSelectedLastName() - processValidators
setSelectedLastName() - processUpdates
dnTextBoxChanged() - LifecycleImpl.executePhase(FacesContext, PhaseExecutor, PhaseListenerManager).


I tried another code:

<a4j:commandLink id="command_link_down" tabindex="290" value="" reRender="cPanel" action="#{keyFeature.keyParameter.dnTextBoxChanged }">
<h:inputText id="dnTextBox" tabindex="290" value="#{keyFeature.keyParameter.paramOneValue}"></h:inputText>
<a4j:ajaxListener type="org.ajax4jsf.ajax.ForceRender" />

And it works, cPanel is reRendered.

But I need to reRender cPanel during onlur.

Please help me in my problem.
Thanks in advance!