pg_hba.conf

Hi,
 i try to connect to my database as $ psql dwnc biosadm  but got the error              "psql: FATAL:  No pg_hba.conf
entryfor host localhost, user
 
biosadm, database dwnc"
Below are the detail in pg_hba.conf
  # TYPE  DATABASE    USER        IP-ADDRESS        IP-MASK
METHOD
     local                  all           all
trust     host                  all           all                   127.0.0.1
255.255.255.255     trust     host                 all            all              192.168.1.45
255.255.255.0      trust     host              dwnc        biosadm     192.168.1.45
255.255.255.0        trust



the line in bold has been deleted before i connect to database . then i
shutdown the database using following command :
pg_ctl -D /usr/local/pgsql/data stop -m fast

followed by startup database :
   postmaster -D /usr/local/pgsql/data > logg 2>&1  &

Does anybody know why does the above error  occur when trying to connect
database and try connect through client using pgadmin??? thanks in advance