From: Shing Wai Chan <shing.wai.chan_at_oracle.com>
Date: Wed, 24 Aug 2011 18:21:50 -0700

I have just installed 3.1.1 FCS. It is working for me.
You may like to check the following:
1. whether there is any exceptions in server.log
2. check whether the application is working without setting the default
web module
     If it is working, then try to set the default web module.

Shing Wai Chan