How to use definition xml file?

[kentzhou]

I have a web app and deployed to JBOSS server.
There are some screens definition as:

In file requestmappings.xml :
<url-mapping url="/mydir" screen="myhome"/>

In file screendefinitions.xml:

<screen-name>myhome</screen-name>
< parameter key="HtmlTitle" value="myhome" direct="true"/>
< parameter key="HtmlBanner" value="/mydir/banner.jsp" direct="false"/>
......
< /screen>

I can access each part of the screen. For instance, banner.jsp in broswer
http://localhost/mydir/banner.jsp

But I can't access the screen like
http://localhost/mydir/myhome

how to slove this issue?