validate doesn't work

[marcel.m.vielsack.cluetec.de]

Hi folks!

I'm trying to validate an user input. I hope someone can help me.
Here is my code:

<h:inputText value="#{box.text}" required="true">
   <a:support id="myInput" event="onblur" reRender="output" ajaxSingle="true" bypassUpdates="true"/>
   <s:validate/>
</h:inputText>

@Length(max = 40)
@NotEmpty
private String text;

Is anything missing? Any annotations, configs or something else?

An other thing just came to my mind: Is it possible that the validation works and I just don't notice it? is there a console output or anything else?

Cheers Marcel