initdb:failed ; What is problem?

Dear Sir(s),

i downlaod cygwin from internet with Database Install Mode and install it.
Then Execute cygwin.bat shell comand cygserver-config . execute cygserver and cygrunsvr as service on Windows 2000. Then write command initdb -D /var/postgresql/data and initdb:failed. as see follow error detail:

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

The database cluster will be initialized with locale C.

creating directory /var/postgresql/data... ok
creating directory /var/postgresql/data/base... ok
creating directory /var/postgresql/data/global... ok
creating directory /var/postgresql/data/pg_xlog... ok
creating directory /var/postgresql/data/pg_clog... ok
selecting default max_connections... Signal 12
Signal 12
Signal 12
Signal 12
Signal 12
Signal 12
10
selecting default shared_buffers... Signal 12
Signal 12
Signal 12
Signal 12
Signal 12
Signal 12
Signal 12
Signal 12
Signal 12
Signal 12
Signal 12
50
creating configuration files... ok
creating template1 database in /var/postgresql/data/base/1... Signal 12

initdb: failed
initdb: removing data directory "/var/postgresql/data"

What can i do to solve this problem and to run cygwin database postgresql.

Best Regards