nested tiles

hi,
using struts 1.2 and tomcat 5

i want to develop nested tiles.
I found no documentation about usage.

bodyFrame.jsp put an parameter body.
But it don�t works. body isn�t displayed. Have any suggestions?

My tiles-def.xml
------------------------
<definition name="defaultLayout" template="/WEB-INF/pgs/common/layout/layout.jsp">
<put name="header" value="/WEB-INF/pgs/common/layout/header.jsp" />
<put name="navigation" value="/WEB-INF/pgs/common/layout/navigation/default_nav.jsp" />
<put name="bodyFrame" value="/WEB-INF/pgs/common/layout/bodyFrame.jsp" />
</definition>

<definition name="startpage" extends="defaultLayout">
<put name="body" value="/startpage.jsp" />
</definition>

layout.jsp
------------------------------
<%@ taglib uri="/WEB-INF/struts-tiles.tld" prefix="tiles" %>

<%-- Header incl. <body> --%>
<tiles:insert attribute="header" />

<%-- complete navigation --%>
<tiles:insert attribute="navigation" />

<%-- Rest of the Page (everything after the navigation) --%>
<tiles:insert attribute="bodyFrame" >
<tiles

ut name="body" type="page" /> <-- here i put the body
</tiles:insert>

bodyFrame.jsp
---------------------------
<%@ taglib uri="/WEB-INF/struts-tiles.tld" prefix="tiles" %>
<div id="backgrounddiv">
<div id="header">
<h1>Community</h1>
</div>
<div id="globalcontainer">
<tiles:insert name="bodypage" /> <-- this istn�t displayed
</div>
</div>
</body>
</html>

Your struts-config.xml should look something like

<action-mapping>
.
.
<action path="/myPage" type="Package.SomeAction">
<forward name="start" path="startpage"/>
</action>
.
.
</action-mapping>

Your SomeAction.java class should have

ActionForward forward = mapping.findForward("start");

From Browser you need to use URL
http://......../myPage.do

If you are not sure how this works then look at article below and concentrate on Solution 6 and 7.
http://www.javaworld.com/javaworld/jw-01-2002/jw-0104-tilestrut.html