I was unable to run the tutorial because of look uo faild.
The pblm was in
Object ref = context.lookup("java:/comp/env/ejb/Fibo");
I changed the code to
Object ref = context.lookup("ejb/Fibo");
Those having the same pblm, can look in the JNDI name space,check where u can finsd the Fibo.
Goes to http://localhost:8080/jmx-console and invoke the list().