Just installed WP, “Cannot modify header information” issue

hi,

I’ve just installed wordpress and edited my wp-config. Install was ok. Now, when I access: http://www.website.com/wp-login.php I have the following lines of errors above the login form:

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

When I log in as an admin I have blank screen with:

Warning: Cannot modify header information – headers already sent by (output started at /home/ju82093/wp-config.php:1) in /home/ju82093/wp-login.php on line 302
Warning: Cannot modify header information – headers already sent by (output started at /home/ju82093/wp-config.php:1) in /home/ju82093/wp-login.php on line 314
Warning: Cannot modify header information – headers already sent by (output started at /home/ju82093/wp-config.php:1) in /home/ju82093/wp-includes/pluggable.php on line 665
Warning: Cannot modify header information – headers already sent by (output started at /home/ju82093/wp-config.php:1) in /home/ju82093/wp-includes/pluggable.php on line 666
Warning: Cannot modify header information – headers already sent by (output started at /home/ju82093/wp-config.php:1) in /home/ju82093/wp-includes/pluggable.php on line 667
Warning: Cannot modify header information – headers already sent by (output started at /home/ju82093/wp-config.php:1) in /home/ju82093/wp-includes/pluggable.php on line 868

I login, and then I got errors on /wp-login.php

Warning: Cannot modify header information – headers already sent by (output started at /home/ju82093/wp-config.php:1) in /home/ju82093/wp-login.php on line 302
Warning: Cannot modify header information – headers already sent by (output started at /home/ju82093/wp-config.php:1) in /home/ju82093/wp-login.php on line 314
Warning: Cannot modify header information – headers already sent by (output started at /home/ju82093/wp-config.php:1) in /home/ju82093/wp-includes/pluggable.php on line 665
Warning: Cannot modify header information – headers already sent by (output started at /home/ju82093/wp-config.php:1) in /home/ju82093/wp-includes/pluggable.php on line 666
Warning: Cannot modify header information – headers already sent by (output started at /home/ju82093/wp-config.php:1) in /home/ju82093/wp-includes/pluggable.php on line 667
Warning: Cannot modify header information – headers already sent by (output started at /home/ju82093/wp-config.php:1) in /home/ju82093/wp-includes/pluggable.php on line 868

What should I do?

Thanks