initdb - Error FATAL: shmat(id=1179648) failed

I am trying to (for the first time) setup PostgreSQL 
version 7.4.3) on windows 98. 
I have cygwin version 1.5.10 installed and running. 

However, when I give "initdb -D /usr/local/pgsql/data" 
command in a cygwin window, I get an error "initdb failed" 

$ initdb -D /var/lib/pgsql/data 
The files belonging to this database system will be 
owned by user "EVANDRO". 
This user must also own the server process. 

The database cluster will be initialized with locale C. 

creating directory /var/lib/pgsql/data... ok 
creating directory /var/lib/pgsql/data/base... ok 
creating directory /var/lib/pgsql/data/global... ok 
creating directory /var/lib/pgsql/data/pg_xlog... ok 
creating directory /var/lib/pgsql/data/pg_clog... ok 
selecting default max_connections... 10 
selecting default shared_buffers... 50 
creating configuration files... ok 
creating template1 database 
in /var/lib/pgsql/data/base/1... FATAL: shmat 
(id=1179648) failed: Invalid argument 

initdb: failed 
initdb: removing data directory "/var/lib/pgsql/data" 

Comments: 

The cygserver is running in other DOS window 
(according "How to start Cygserver" in cygserver.README) 

Checking the most recent posts on the postgresql 
mailing list (apparently this error happens only in 
Windows 98/Me), I try modify the cygserver.conf: 

kern.srv.sharedmem no 
kern.ipc.semmns 100 

But don´t works.... 

Any pointers ? It will be great help! 

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