No connection could be made because the target machine actively refused it...

Hi,

I've installed PostgreSQL 9.2 (client and server) on a local Windows desktop and can run pgAdmin to see the postgres database.
However, now I'm trying to install a sample database to have a play with some queries etc...
I'm using psql, connecting to postgres on localhost as the postgres user and running the following command:

postgres# CREATE DATABASE dvdrental;
postgres# pg_restore --dbname=dvdrental --verbose dvdrental.tar

Nothing happens, and in the postgres log I get the following error:

2013-05-30 20:57:07 BST LOG:  incomplete startup packet
2013-05-30 20:57:45 BST LOG:  could not receive data from client: No connection could be made because the target machine actively refused it.

I've googled this error and it seems that it is probably something to do with my pg_hba.conf file.
I have tried each of the following entries and reloaded the file each time (pg_ctl reload), but to no avail:

# IPv4 local connections:
host     all             all         255.255.255.255/0             trust
host    all             all             127.0.0.1/32            trust
host    all             all             0.0.0.0/0               trust
local   all             all                                     trust

Many thanks.