Name bound to Context

[Fran�ois De Grandi]

Hi everibody !
I want to send a mail using Tomcat4.I setted the Mail Session JNDI in Tomcat console.Jndi is: mail/session , host: localhost
But When I run the Servlet,Tomcat says:"java:comp not bound to this context"
The method is according to the tomcat document.
servlet code is:"Context initCtx = new InitialContext();
Context envCtx = (Context) initCtx.lookup("java:comp/env");
Session session = (Session)envCtx.lookup("mail/session");"
Even I change the code to"Context initCtx = new InitialContext();
Session session = (Session)initCtx.lookup("mail/session");"
I also add the resource ref to web.xml and it is:
////////////////////////////////////////////////////////////////////////
<resource-ref>
<res-ref-name>mail/session</res-ref-name>
<res-type>javax.mail.Session</res-type>
<res-auth>Container</res-auth>
</resource-ref>
I had already set the value :
///////////////////////////////////////////////////////////
<Resource auth="Container" name="mail/session" scope="Shareable" type="javax.mail.Session"/>
<ResourceParams name="mail/session">
<parameter>
<name>mail.smtp.host</name>
<value>localhost</value> // or a valid ISP smtp host : mail.bluewin.ch
</parameter>
</ResourceParams>
in server.xml.
WHAT DID I MISS ? Please help...!
Thanks