DataModel problem(getRowData() always returns 0)

[Dirk Hoegemann <di...@web.de>]

Hello,

I have a problem with the h:dataTable tag, respectively the ListDataModel. I 
hope somebody can give me a hint (or better - a solution;-)) on that.
The  problem is that the getRowIndex(also getRowData) Method returns always 
the element at position 0 (no matter which element has been selected).

Info: I am using myfaces version 1.1.1 with Facelets1.0.12 in JBoss4.0.4 
with EJB3.
The Bean (admin) is directly set into the HttpSession like this (from 
LogInBean(that Bean lives in the request Scope!?)):

FacesContext fc = FacesContext.getCurrentInstance();
            HttpSession session = (HttpSession) 
fc.getExternalContext().getSession(false);
          session.setAttribute("admin",adminbean);  //Is this the common (or 
a recommended)way?

The UI:
<h:form>
<fieldset><legend><b>Courses</b></legend>
<h:dataTable value="#{admin.courses}" var="studIndex"
rendered="#{not empty admin.courses}">
<h:column>
<h:outputText value="#{studIndex.name}"/>
</h:column>
<h:column>
<h:commandButton type="submit" value="Delete" 
action="#{admin.deleteCourse}"/>
</h:column>
</h:dataTable>
</fieldset>
</h:form>

The corresponding Bean:
...
 private ListDataModel courses;
  ...
 public DataModel getCourses()
    {
       courses = new ListDataModel();
      courses.setWrappedData(Utils.getAdminEdit().getCourses()); //A 
stateless SessionBean gets the List via the EJB3 EntityManager
       return skillKategorien;
    }
...
public String deleteCourse()
    {
        if(getCourses().isRowAvailable())
        {
            int index = this.courses.getRowIndex();
            Course todelete =
                ((List <Course>)(this.courses.getWrappedData())).get(index);
           Utils.getAdminEdit().deleteCourse(todelete);
        }
        return "editCourses";
    }//always deletes the Element at position index 0!!

Any ideas, where I can expect the problem?
Thanks!

Regards
Dirk Högemann