InitDB Failure on install

Hi All

I'm getting failure to install PostgreSQL 8.0 Beta1.

I'm doing it on W2K Server SP4, P4 2.2 512Mb HD Scsi.

Error:

The files belonging to this database system will be owned by user
"postgres".
This user must also own the server process.

The database cluster will be initialized with locale portuguese-brazil.

fixing permissions on existing directory F:/PostgreSQL/data ... ok
creating directory F:/PostgreSQL/data/global ... ok
creating directory F:/PostgreSQL/data/pg_xlog ... ok
creating directory F:/PostgreSQL/data/pg_xlog/archive_status ... ok
creating directory F:/PostgreSQL/data/pg_clog ... ok
creating directory F:/PostgreSQL/data/pg_subtrans ... ok
creating directory F:/PostgreSQL/data/base ... ok
creating directory F:/PostgreSQL/data/base/1 ... ok
creating directory F:/PostgreSQL/data/pg_tblspc ... ok
selecting default max_connections ... 10
selecting default shared_buffers ... 50
creating configuration files ... ok
creating template1 database in F:/PostgreSQL/data/base/1 ... WARNING: could
not find a match for Windows timezone "Hora oficial do Brasil"
FATAL: could not create shared memory segment: No error
DETAIL: Failed system call was shmget(key=1, size=1196032, 03600).
child process was terminated by signal 1
initdb: failed
initdb: removing contents of data directory "F:/PostgreSQL/data"

Best Regards
Rodrigo Moreno