Installing debugger

I have built posgresql 8.3.1 on a FreeBSD 6.1 via the ports system
WITH_DEBUG=true and also on a Windows machine with the debugger
selected. I see the plugin_debugger.dll under the lib/plugins folder on
the Windows machine as well. But when I look for the procs, they are not
there....

template1=# select * from pg_proc where proname like 'pldbg%';
 proname | pronamespace | proowner | prolang | procost | prorows | proisagg | prosecdef | proisstrict | proretset |
provolatile| pronargs | prorettype | proargtypes | proallargtypes | proargmodes | proargnames | prosrc | probin |
proconfig| proacl  

---------+--------------+----------+---------+---------+---------+----------+-----------+-------------+-----------+-------------+----------+------------+-------------+----------------+-------------+-------------+--------+--------+-----------+--------
(0 rows)

Can someone help or point me to some docs that can tell me what else I
need to do to enable debugging plpgsql?

--
Robert