postmaster fails to start

I have installed version 6.5 on Solaris 7, Intel. I used gcc-2.95.1 and
gnu make to build.

Here is the result of initdb and postmaster -i:
cr-jay.com% initdb

We are initializing the database system with username postgres (uid=1003).
This user will own all the files and must also own the server process.

Creating Postgres database system directory /usr/local/pgsql/data

Creating Postgres database system directory /usr/local/pgsql/data/base

Creating template database in /usr/local/pgsql/data/base/template1

Creating global classes in /usr/local/pgsql/data/base

Adding template1 database to pg_database...

Vacuuming template1
Creating public pg_user view
Creating view pg_rules
Creating view pg_views
Creating view pg_tables
Creating view pg_indexes
Loading pg_description
cr-jay.com% postmaster -i
IpcMemoryCreate: shmget failed (Invalid argument) key=5432001,
size=1063936, permission=600
FATAL 1: ShmemCreate: cannot create region

Note postmaster without the '-i' also failed with the same message.

Christopher R. Jones, P.Eng.
14 Oneida Avenue
Toronto, Ontario M5J 2E3
Tel. 416 203-7465
Fax. 416 203-3044
Email cj(at)interlog(dot)com