Errores tras la primera instalación

[d00maz]

Buenas,
Es la primera vez que instalo wordpress en mi hosting (aqphost.com) y quisiera saber qué es lo que hice mal, seguí las instrucciones de wordpress y me salió este error:

Warning: Cannot modify header information - headers already sent by (output started at /home/revistab/public_html/blog/wp-config.php:1) in /home/revistab/public_html/blog/wp-login.php on line 302

Warning: Cannot modify header information - headers already sent by (output started at /home/revistab/public_html/blog/wp-config.php:1) in /home/revistab/public_html/blog/wp-login.php on line 314

Warning: Cannot modify header information - headers already sent by (output started at /home/revistab/public_html/blog/wp-config.php:1) in /home/revistab/public_html/blog/wp-includes/pluggable.php on line 665

Warning: Cannot modify header information - headers already sent by (output started at /home/revistab/public_html/blog/wp-config.php:1) in /home/revistab/public_html/blog/wp-includes/pluggable.php on line 666

Warning: Cannot modify header information - headers already sent by (output started at /home/revistab/public_html/blog/wp-config.php:1) in /home/revistab/public_html/blog/wp-includes/pluggable.php on line 667

Warning: Cannot modify header information - headers already sent by (output started at /home/revistab/public_html/blog/wp-config.php:1) in /home/revistab/public_html/blog/wp-includes/pluggable.php on line 868

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Debo decir que siempre aparece un mensaje:
Warning: Cannot modify header information - headers already sent by (output started at /home/revistab/public_html/blog/wp-config.php:1) in /home/revistab/public_html/blog/wp-login.php on line 302

Warning: Cannot modify header information - headers already sent by (output started at /home/revistab/public_html/blog/wp-config.php:1) in /home/revistab/public_html/blog/wp-login.php on line 314

Si pueden ayudarme por favor, estaría muy agradecido.

Saludos y gracias.