Can't call an EJB from Within another EJB

[J Davis]

We have gotten our Orion server(1.3.8) to work with EJBs on a singular
level(i.e. we can call EJB A, B or C and it works fine.)  But If one of our
EJB's tries to call another(i.e. A calls B)  A throws a naming exception
that it can't find the EJB reference when doing a jndi lookup.  Is there a
dependency tag or something within one of the XML files that denotes EJB
dependencies on one another?  I'm sure this is something simple, but it is
getting annoying.