a problem in authority

<p>Hi, all<p>I have installed the Postgresql 7.3 . But I think something is wrong with authority.<p>I have made the
followingoperations:<p>1. I enter the psql and run 'alter user postgres with password 'postgres''<p>2. I change the
pg_hba.confand set the auth_type from 'trust' to 'password'<p>3. Then I can not connect to server.<p>I have test
connectfrom local or connect from host, but it just return 'authority fail for user postgres'.<p>I can connect to
postgresql7.23 successfully after above steps;<p>Great thanks for any message.<p>Josh