installation - Mailing list pgsql-admin

Hello All,

I have installed postgresql on windows NT 4.0.But it is giving this problem when i am giving this command.

The programs 'postmaster' and 'psql' are needed by pg_ctl but
were not found in the directory '/usr/bin'.
Check your installation.

         I checked the installation in the default package but could not find there.Cygwin Deamon is also running. Please advice.

Thanks and regards

Vivek