Stateless EJB (exposed only one fn) as a web service - Error illegal public

I have a stateless EJB which has 3 methods.
I expose one of them only as a web service.
But when I test my web service I receive an error...
500 Internal Server Error
Servlet error: The class blah.blah.I_EmpRemote contains illegal public methods.
These methods do not conform to the
restrictions imposed by the web service implementation
Offending methods:
public abstract blah.blah.Employee blah.blah.I_EmpRemote.GetEmployee(java.lang.String) throws java.rmi.RemoteException
public abstract blah.blah.Operator blah.blah.I_EmpRemote.GetOperator(java.lang.String,int) throws java.rmi.RemoteException
So does this mean .. I should make sure all or none of my methods of an EJB are exposed in the Web Service ?
Or I can resolve this in any other way ?
Thanks,
Krishna

Or is it becoz the two methods that it objected to were returning user-defined objects and not String, void, Integer ... that a web service can recognize !
But still ... why cannot it just ignore the methods that are not exposed ?
Can someone throw some light on this.
Thanks,
Krishna

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