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listener element error

 
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One of my servlets implements HttpSessionListener, and I configured that in the deployment descripter using <listener> element. But the tool (Jbuilder) I used is showing an error message "Element type 'listener' must be declared".

I placed <listener> element before the servlets declared (that is the J2EE specification) and just after the <desplay-name> element. My configuration looks like the following:

<listener>
<listener-class>com.space.chat.ChatDispatch</listener-class>
</listener>

I use servlet version 2.2.

Please anyone help me. Thanks very much in advance.
 
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Listeners showed up in version 2.3
 
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