running two servers on one machine

FreeBSD 3.2Postgtres 6.5 and 6.5.3
I have 6.5 up and running. I am trying to bring up a second server,
(6.5.3) on a different port. I have configured it into the compile process
and also tried it from the command line. As soon as I start the
second postmaster process, the main DB server starts refusing
connactions.The second server is in a chroot'ed environment, so shared libs,
data, etc is _absolutely_ separate.Is shared memory my problem? How could I (temporarily) hack
this until our compatability testing is complete?


--
"The opposite of a profound truth may well be another profound truth."- Bohr