WampServer

hi i already read the tutorial that change the password in the privilagges area then change the
$cfg['PmaAbsoluteUri'] = 'localhost/phpmyadmin/'; to that .. and
$cfg['Servers'][$i]['user'] = 'root'; // MySQL user
$cfg['Servers'][$i]['password'] = 'new pass'; // MySQL password (only needed

but after i make this.. it become like this

Warning: Cannot modify header information - headers already sent by (output started at C:\wamp\phpmyadmin\libraries\common.lib.php(100) : eval()'d code:814) in C:\wamp\phpmyadmin\libraries\select_theme.lib.php on line 92

Warning: Cannot modify header information - headers already sent by (output started at C:\wamp\phpmyadmin\libraries\common.lib.php(100) : eval()'d code:814) in C:\wamp\phpmyadmin\index.php on line 60

Warning: Cannot modify header information - headers already sent by (output started at C:\wamp\phpmyadmin\libraries\common.lib.php(100) : eval()'d code:814) in C:\wamp\phpmyadmin\index.php on line 121

please help me ASAP