postgres access - pg_hba.conf

Hi..

I'm trying to setup an app (gforge) to communicate using the postgres db.

I've modified the pg_hba.conf file and I can sort of get access. However, it
appears that I can't access the database using a passwd. I assume I'm using
the wrong passwd, although I created the db, and thought that this was the
passwd for the db! Is there a way to change the passwd? I have root access
to the system, but I'm not a postgres dba...

I have the following pg_hba.conf file:
# GFORGE5
#local all all trust
local all all md5
# IPv4 local connections:
host all all 127.0.0.1 255.255.255.255 md5
#host all all 127.0.0.1 255.255.255.255 trust

I type the following:
[root(at)lserver2 ~]# psql -d gforge -U gforge -h 127.0.0.1 -W gforge
psql: warning: extra command-line argument "gforge" ignored
Password for user gforge:

I get:
psql: FATAL: password authentication failed for user "gforge"

Any thoughts/etc...
Basically, it looks like I need to know how to create a database, with a
user/dbname/db address/passwd so the pg_hba.conf works correctly...

(If i leave out the md5, and use the "trust" then I can access the db
without a passwd, but that's not what I need.)

thanks

-bruce
bedouglas(at)earthlink(dot)net