problem starting postmaster under W2000

I've installed the following:
cygwin 1.1.8_2
cygipc 1.09-2
postgresql 1.0.3

I was following the steps outlined at:
http://people.freebsd.org/~kevlo/postgres/portNT.html

Got through making it and running initdb.

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

But how do you change the system shared memory in Windows 2000?

Any help would be greatly appreciated, thanks.

JM