Cannot connect to server

Hi,

I am attempting to 'add a connection' to the postgres database using pgadminlll v_1.8.4, postgresql v 8.3.3 -  1 with PostGis 1.3.3 on Mac OS 10.5.4.

After an initial installation it may connect successfully for a couple of days before I'm unable to connect anymore. It is always the same pattern.

I've tried the recommendations offered on the postgresql community pages but nothing seems to work. I've made the usual changes to:

postgreql.conf ('*' instead of 'localhost')

pg_hba.conf

Error connecting to the server: could not connect to server: No such file or directory

          Is the server running locally and accepting

          connections on Unix domain socket "/tmp/.s.PGSQL.5432"?

--
Paul J. Shapley