JNOS message question

I'm in the process of installing JNOS 111f for Linux and have run into a
problem.  When a user sends a message to another local user, the system
responds with a "Msg queued" message, but the message is never delivered.
If I log in as Sysop, I can't see any messages.  If I look in the
/spool/mqueue I can see all the messages sitting there.

Anyone have any suggestions on where to start?

Thanks,
Jeff
N0WJP