a4j:mediaoutput doesn't call paint method

[vagaone]

Good Morning everyone,

i have a Problem with a4j:mediaoutput, but at first, here is my system:

RichFaces 3.3.2.SR1

Seam 2.1.2.GA

PortletBridge 2.0.0.CR1

and it is running as a portlet on JBoss-epp-4.3.GA_CP02.

But i get the same issue, when it's running as a normal application (no portlet) on jboss-4.2.3.GA.

Ok, here is the problem:

When i use the component like this, everything works fine. The paint method is called, and the picture is painted.

<a4j:mediaOutput element="img" 
        cacheable="false"
        session="true"
        mimeType="image/jpg"
        createContent="#{navigationController.paint}"

        value="1"

/>

But if i try to set the value of the component dynamically, the paint method isn't called, no errors occure, and the picture isn't painted:

<a4j:mediaOutput element="img" 
         cacheable="false"
         session="true"
         mimeType="image/jpg"
         createContent="#{navigationController.paint}"
         value="#{dataBean.getValue}"
  />

I tried it with String-Values, Integer-Values, Objects of my data-class (serialized)... everytime the same problem.

What am I doing wrong? I didn't find something via google, so i'm trying it here.

If you need some more information, please let me know.

Thank you very much!