This week's giveaway is in the EJB and other Java EE Technologies forum. We're giving away four copies of EJB 3 in Action and have Debu Panda, Reza Rahman, Ryan Cuprak, and Michael Remijan on-line! See this thread for details.
This should then be a problem within your Customer.jsp. Can you try replacing the content inside the page with some dummy text ? Then you could go about by debugging the code inside in case this works fine.