f:ajax problem JSF

Question

This is my code :-

  <p:carousel var="item" animate="true" circular="true" rows="2"  effect="easeOutStrong" value="#{RegisterBean.objBlogTemplateList}">
                                        <h:inputHidden id="hdnBlogTemplateId" binding="#{RegisterBean.hdnBlogTemplateId}" value="#{item.templateId}"/>
                                            <h:graphicImage  alt="#{item.templatePicName}" style="border: solid 5px white;width: 200px;height: 200px;"  value="#{app:getCommonImagePath(item.templatePicName)}">
                                                <f:ajax event="click" execute="hdnBlogTemplateId" listener="#{RegisterBean.setBlogTheme}"/>
                                            </h:graphicImage>
                                    </p:carousel>

This is my managed bean code :-

private HtmlInputHidden hdnBlogTemplateId;

    public HtmlInputHidden getHdnBlogTemplateId() {
        return hdnBlogTemplateId;
    }

    public void setHdnBlogTemplateId(HtmlInputHidden hdnBlogTemplateId) {
        this.hdnBlogTemplateId = hdnBlogTemplateId;
    }

   public void setBlogTheme(AjaxBehaviorEvent e){
         System.out.println("Hello");
        //System.out.println(hdnBlogTemplateId.getValue());

        //System.out.println(objGraphic.toString());
    }

Hello is never printed in my console. Please help.