Rich,

Appologies, this is a common one and I haven't gotten round to writing it up in the trouble-shooting section.

What you need to do is change the following line this trio.xml:

<rmi create-registry="true"/>

to:

<rmi create-registry="true" host-name="xxxx"/>

where xxxx is the machine name or ip address of the machine that your trio server is running on.

Cheers
Paul