Add url parameter in navigation-case

Hi All,
We need to add a param to the URL when doing navigation, the param value is come from a session bean. I tried following, but not working, the param showed in URL is just what I typed in the <to-view-id>, i.e. not runtime replaced by the session bean attribute value... does any one know how to do this?
<navigation-rule>
<from-view-id>/user/PODList.jspx</from-view-id>
<navigation-case>
<from-outcome>detail</from-outcome>
<to-view-id>/user/PODDetail.jspx?crmid=#{userInfo.userId}</to-view-id>
<redirect/>
</navigation-case>
</navigation-rule>
Thanks so much.

An update on this:
I tried what Simon suggested. Turns out that it works perfectly !! It does exactly what I need. Thanks so much Simon. You are really an expert and great helper !!
Thanks so much for your help. !!
One more question to Simon and thread that this ViewHandler.getActionURL works perfectly with all those navigations that specified in Navigation case. Our app is also using a welcome-file-list in web.xml which specify the page to call when the app directory is called. e.g we have value like:
<welcome-file-list>
<welcome-file>/faces/user/firstpage.jspx</welcome-file>
</welcome-file-list>
So question is how to get this page also have the parameter appended?
Thanks so much for any help.

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As a test, don't display any records. At the top of your
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Add url parameter in navigation-case

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