JSF - Unable to call servlet

[dwarakanathan thiru]

Hi All,

I need to call a servlet from my JSF / xhtml file. But the servlet is not getting called for some reason.

FacesContext context = FacesContext.getCurrentInstance();   
context.getExternalContext().redirect("/portal/DownloadServlet");   
context.responseComplete();  

But the page is not getting re-directed to the servlet and it stays on the same page.
I am using RichFaces for the UI framework.

Also, in another application I have used SUN's RI / jsp file and it worked for me.

The difference that I see is I use "javax.portlet.faces.GenericFacesPortlet" in the current application for rich faces to work.
In the working application, I used "com.sun.faces.portlet.FacesPortlet". Why is this issue in rich faces and not in sun's RI.

Any idea on this?

Thanks!!