'Warning: Cannot add header information'

I installed phpPgAdmin 2.4.2 on my server called maestro and configures config.inc.php as follow:

$cfgServers[1]['local']    = false;
$cfgServers[1]['host']        = 'maestro';
$cfgServers[1]['port']        = '5432';
$cfgServers[1]['adv_auth']     = true;

$cfgServers[1]['user']     = 'postgres';
$cfgServers[1]['password']     = '';
$cfgServers[1]['only_db']     = '';   

and receive this error message :

Warning: Cannot add header information - headers already sent by (output started at c:\easyphp\www\phppgadmin\config.inc.php:130) in c:\easyphp\www\phppgadmin\lib.inc.php on line 270

Warning: Cannot add header information - headers already sent by (output started at c:\easyphp\www\phppgadmin\config.inc.php:130) in c:\easyphp\www\phppgadmin\lib.inc.php on line 271

When I change the config to :

$cfgServers[1]['local']    = true;
$cfgServers[1]['host']        = 'localhost';
$cfgServers[1]['port']        = '5432';
$cfgServers[1]['adv_auth']     = true;

$cfgServers[1]['user']     = 'postgres';
$cfgServers[1]['password']     = '';
$cfgServers[1]['only_db']     = '';   

Access is denied, password or login incorrect...
Do you have any idea??