Liferay portal error

I need open new browser window with PDF format.I have jsp,javaservelt with PDF stuff.This same code working in webserver.But it is not working in Lifray portal.When i click the button , it shows resource not found.

I have tried with java serv开发者_如何转开发let class and struts, both not open the PDF.

Portal error Message:

[PortalImpl:2948] Current URL /web/guest/PDFOpenExer generates exception: null

What i have to do open the new PDF ?

Please help me.

URL /web/guest/PDFOpenExer maybe is not a page maanged by liferay. It doesnt exists.