Cannot start the PostgreSQL service

Hello. Sorry if I have sent this to too may mail boxes. I hope one of them is correct. Please forward this on if not.

This was working until recently. In Services I right clicked on properties and I think I changed the METHOD in pg_hba.conf from md5 to trust.
I think after making this change the problems started.

In Services I cannot start the PostgreSQL Server 8.4 due to Error:1069 The service did not start due to a logon failure.

I have tried to set up pg_hba.conf correctly. Currently it is set to the following -

# TYPE DATABASE USER CIDR-ADDRESS METHOD
# IPv4 local connections:
host all all 127.0.0.1/32 trust
host all all 192.168.1.1/5432 trust
# IPv6 local connections:
host all all ::1/128 trust

I have tried to set up pgpass.conf correctly as this was empty. Currently set to the following -

127.0.0.1:5432:*:postgres:dbpass

The errors remain. Also I have been getting the error "could not connect to Server: Connection refused" detailed below -

http://www.pgadmin.org/docs/1.14/connect-error.html

I wanted to reload the configuration (before attempting to start the Service again ) and I got the error "Reload command returned an error (1)".

I am not sure what to try next. I have some databases I do not want to lose if I can avoid it.

Any ideas?

Thanks, Dave.