Installation and execution under Jail'ed virtual machine

Question probably steps beyond the general list...

Have a FreeBSD 4.2 box...  have created two Virtual machines with the
jail process.
Apache and PHp configure and execute fine, but am having some
cinfiguration and execution problems with pgsql... not sure if I am
missing something or if pgsql doesn't like being in the jail

Attempting to manually start the postmaster produces the following:

%postmaster -i
IpcMemoryCreate: shmget failed (Function not implemented) key=5432010,
size=144, permission=700
This type of error is usually caused by an improper
shared memory or System V IPC semaphore configuration.
For more information, see the FAQ and platform-specific
FAQ's in the source directory pgsql/doc or on our
web site at http://www.postgresql.org.
IpcMemoryIdGet: shmget failed (Function not implemented) key=5432010,
size=144, permission=0
IpcMemoryAttach: shmat failed (Function not implemented) id=-2
FATAL 1:  AttachSLockMemory: could not attach segment
%

Searching for jail faq's and posts regarding this matter produces some
close, but not helpful posts regarding chroot'ed environments.

Any insights, requests for details, and assistance are appreciated.

Dave