Property not Writable on type exception

Question

I found another post about this problem but the reply was
Sorry, I have solved the problem.
I am using JBoss 4.2.1.GA, Facelets and jboss-seam-CVS.2007-09-17_01-34-40. I am trying to do this.
     <h:form>
          <h:panelGrid id="lpg_01" binding="#{conceptManager.letterPanelGrid}"/>
     </h:form>
Here is the Java code that is in the conceptManager Bean.
     private HtmlPanelGrid letterPanelGrid;
     public HtmlPanelGrid getLetterPanelGrid()
          System.out.println("************ getLetterPanelGrid");
          FacesContext facesContext = FacesContext.getCurrentInstance();
          Application application = facesContext.getApplication();
//          letterPanelGrid = new HtmlPanelGrid();
          letterPanelGrid = (HtmlPanelGrid)application.createComponent
                                        (HtmlPanelGrid.COMPONENT_TYPE);
          letterPanelGrid.setId("lpg_01");
          List<UIComponent> children = letterPanelGrid.getChildren();
          letterPanelGrid.setColumns(1);
          HtmlCommandLink link = new HtmlCommandLink();
//          String s = new String("#{conceptManager.testMethod}");
          String s = new String("homePage");
          MethodExpression me = application.getExpressionFactory().
                    createMethodExpression(facesContext.getELContext(), s,
                    null, new Class<?>[0]);
          link.setActionExpression( me );
          link.setId("linkId");
          HtmlOutputText output = new HtmlOutputText();
          output.setValue(new String("ClickMe"));
          link.getChildren().add(output);
          children.add(link);
          return letterPanelGrid;
When the page is initially displayed everything seems to work fine. I looked at the html in the browser and it looks correct. The problem occurs when I click on the command link. During the Restore View Phase JSF tries to perform the binding again but gives the following problem. I got lost trying to follow the Variable Resolver code, too much abstractness. I haven't given up looking at it but I think I need some help with this.
exception
javax.servlet.ServletException: /AZIndexT1.xhtml @26,61 binding="#{conceptManager.letterPanelGrid}": Property 'letterPanelGrid' not writable on type javax.faces.component.html.HtmlPanelGrid
     javax.faces.webapp.FacesServlet.service(FacesServlet.java:256)
     org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:64)
     org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:83)
     org.jboss.seam.web.MultipartFilter.doFilter(MultipartFilter.java:85)
     org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
     org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:64)
     org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
     org.jboss.seam.web.RedirectFilter.doFilter(RedirectFilter.java:44)
     org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
     org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:141)
     org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:281)
     org.jboss.seam.web.Ajax4jsfFilter.doFilter(Ajax4jsfFilter.java:60)
     org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
     org.jboss.seam.web.LoggingFilter.doFilter(LoggingFilter.java:58)
     org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
     org.jboss.seam.servlet.SeamFilter.doFilter(SeamFilter.java:150)
     org.jboss.seam.web.RedirectFilter.doFilter(RedirectFilter.java:44)
     org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
root cause
javax.el.PropertyNotFoundException: /AZIndexT1.xhtml @26,61 binding="#{conceptManager.letterPanelGrid}": Property 'letterPanelGrid' not writable on type javax.faces.component.html.HtmlPanelGrid
     com.sun.facelets.el.TagValueExpression.setValue(TagValueExpression.java:95)
     com.sun.faces.lifecycle.RestoreViewPhase.doPerComponentActions(RestoreViewPhase.java:244)
     com.sun.faces.lifecycle.RestoreViewPhase.doPerComponentActions(RestoreViewPhase.java:249)
     com.sun.faces.lifecycle.RestoreViewPhase.doPerComponentActions(RestoreViewPhase.java:249)
     com.sun.faces.lifecycle.RestoreViewPhase.execute(RestoreViewPhase.java:193)
     com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:251)
     com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:117)
     javax.faces.webapp.FacesServlet.service(FacesServlet.java:244)
     org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:64)
     org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:83)
     org.jboss.seam.web.MultipartFilter.doFilter(MultipartFilter.java:85)
     org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
     org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:64)
     org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
     org.jboss.seam.web.RedirectFilter.doFilter(RedirectFilter.java:44)
     org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
     org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:141)
     org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:281)
     org.jboss.seam.web.Ajax4jsfFilter.doFilter(Ajax4jsfFilter.java:60)
     org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
     org.jboss.seam.web.LoggingFilter.doFilter(LoggingFilter.java:58)
     org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
     org.jboss.seam.servlet.SeamFilter.doFilter(SeamFilter.java:150)
     org.jboss.seam.web.RedirectFilter.doFilter(RedirectFilter.java:44)

Answer 1

public void setLetterPanelGrid( HtmlPanelGrid grid )
          System.out.println("******************** setLetterPanelGrid");
          letterPanelGrid = grid;
I did have this setter but failed to show it with my example. Hopefully this is all I need for the setter.
I still received the same error;