server not starting

Since I upgraded to 9.1, the server has not been starting. psql works, and
pg_ctl status indicates that no server is connected.
If I run the command: sudo -u postgres /user/lib/postgresql/9.1/bin/pg_ctl
start -D /usr/local/pgsql/data
it says the server is ready to accept connections.
The command sudo -u postgres /user/lib/postgresql/9.1/bin/pg_ctl status -D
/usr/local/pgsql/data
gives:
pg_ctl: server is running (PID:1751)
/usr/lib/postgresql/9.1/bin/postgres "-D" "/usr/local/pgsql/data"
However, netstat indicates no connection to port 5432, and I still cannot
connect.
I am unable to figure out where the LISTEN_ADDRESSES is assigned, perhaps
that is the problem. I am obviously new to administration.

Thanks for any help,
Dick