help setting shared memory in Windows 2000

When I try:
postmaster -i &
I get the following:

$ IpcMemoryCreate: shmget failed (Identifier removed) key=5432010, size=144,
per
mission=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 (Identifier removed) key=5432010, size=144,
permis
sion=0
IpcMemoryAttach: shmat failed (Invalid argument) id=-2
FATAL 1: AttachSLockMemory: could not attach segment

Anyone know how to change the system shared memory in Windows 2000? Or do
you think it is improper System V IPC semaphore configuration causing this
problem.

Any help would be greatly appreciated, thanks.

JM