quartz integration....null pointer exception

hi friends...

i referred the following link to integrate the quartz in my jsf appln.

http://www.oreillynet.com/cs/user/view/cs_msg/86579

but, i get null pointer exception on ctx.getAttribute(QuartzInitializerServlet.QUARTZ_FACTORY_KEY) ...

(actually i m getting the key value as org.quartz.impl.StdSchedulerFactory.KEY, but ctx.getAttribute thro the null value)

what i missed, can u help me

[427 byte] By [Christophersama] at [2007-11-27 8:06:29]