ejb module and jar dependencies

Hi , I am starting a J2EE application on GF 4 and NB 7.3.1 .
I created a J2EE app and web,ejb and common project. Created a new simple session bean in ejb project and put the remote inteface in common project .

Then tried to deply the ejb project by GF console but it fire a java.lang.ClassNotFoundException for the remote interface ,despite the class in present in the common jar in the ejb jar module .

Then why GF fire the error ? I am very hurt with GF ,there is enything that work right ! ( see other of my posts ) .

thanks