pgaccess on win95 connection

Installed the rpm of 6.5.3 seemingly with success.  Can access template1 with pgsql and pgaccess on a Mandrake 6.1
machine.
"ps ax | grep postmaster" reports the following:  551  ?                S            0:00  /usr/bin/postmaster -i -S
-D/var/lib/pgsql1932 pts/1          S            0:00  grep postmaster
 

'1932'  increments by 2 on each iteration of the ps command.   Don't know enough about what I am doing to interpret
this, but in executing pgaccess on the windows machine I get the following:
  the connection window displays      localhost                                                          5432  I
entered                                         template1
postgres                                                         <password>  The connect error message is
          Error trying to connect database "template1" on host localhost
 
    PostgreSQL error message:  Connection to database failed    connectDB() failed:  Is the postmaster running and
acceptingTCP/IP(with -i) connections    at 'localhost' on port '5432'?
 

Tried changing the port number.   It looks at least like we are getting to the database.  How do I ping the server?