[ADF Faces]Could not find renderer for CoreCommandLink

[Legolas Woodland]

Hi
Thank you for reading my post.
I get the following in application server log file and command link 
button does not show in the page
here is my jsf code
    <af:commandLink immediate="true" text="Component Guide"  
inlineStyle="left: 264px; top: 150px; position: absolute"       
action="guide"/>

and here is a part of web.xml that has some ADF faces declaration :

<filter>
   <filter-name>adfFaces</filter-name>
   <filter-class>oracle.adf.view.faces.webapp.AdfFacesFilter</filter-class>
 </filter>


   <filter-mapping>
   <filter-name>adfFaces</filter-name>
   <servlet-name>Faces Servlet</servlet-name>
 </filter-mapping>
 <servlet>
   <servlet-name>Faces Servlet</servlet-name>
   <servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
   <load-on-startup>1</load-on-startup>
 </servlet>

and here is a part of faces-config.xml which contain some stuff related 
to adf faces

<default-render-kit-id>
     oracle.adf.core
   </default-render-kit-id>

I add two jar files to my web-inf/lib folder
those two jar files are :
adf-faces-api-ea20-SNAPSHOT
adf-faces-impl-ea20-SNAPSHOT
and also some other jar files like
jsf-impl-1.1_01
....


Thanks