Dwa poważne pytania.

Więc.
Po 1.

Pytanie, jak zainstalować multi-site. Potrzebuje zainstalować bbpressa.
Po 2.

Gdy próbuję się wylogować z admina wyskakuje informacja:

Warning: Cannot modify header information - headers already sent by (output started at /home/kromm/public_html/wp-config.php:1) in /home/kromm/public_html/wp-login.php on line 337

Warning: Cannot modify header information - headers already sent by (output started at /home/kromm/public_html/wp-config.php:1) in /home/kromm/public_html/wp-login.php on line 349

Warning: Cannot modify header information - headers already sent by (output started at /home/kromm/public_html/wp-config.php:1) in /home/kromm/public_html/wp-includes/pluggable.php on line 717

Warning: Cannot modify header information - headers already sent by (output started at /home/kromm/public_html/wp-config.php:1) in /home/kromm/public_html/wp-includes/pluggable.php on line 718

Warning: Cannot modify header information - headers already sent by (output started at /home/kromm/public_html/wp-config.php:1) in /home/kromm/public_html/wp-includes/pluggable.php on line 719

Warning: Cannot modify header information - headers already sent by (output started at /home/kromm/public_html/wp-config.php:1) in /home/kromm/public_html/wp-includes/pluggable.php on line 720

Warning: Cannot modify header information - headers already sent by (output started at /home/kromm/public_html/wp-config.php:1) in /home/kromm/public_html/wp-includes/pluggable.php on line 721

Warning: Cannot modify header information - headers already sent by (output started at /home/kromm/public_html/wp-config.php:1) in /home/kromm/public_html/wp-includes/pluggable.php on line 722

Warning: Cannot modify header information - headers already sent by (output started at /home/kromm/public_html/wp-config.php:1) in /home/kromm/public_html/wp-includes/pluggable.php on line 725

Warning: Cannot modify header information - headers already sent by (output started at /home/kromm/public_html/wp-config.php:1) in /home/kromm/public_html/wp-includes/pluggable.php on line 726

Warning: Cannot modify header information - headers already sent by (output started at /home/kromm/public_html/wp-config.php:1) in /home/kromm/public_html/wp-includes/pluggable.php on line 727

Warning: Cannot modify header information - headers already sent by (output started at /home/kromm/public_html/wp-config.php:1) in /home/kromm/public_html/wp-includes/pluggable.php on line 728

Warning: Cannot modify header information - headers already sent by (output started at /home/kromm/public_html/wp-config.php:1) in /home/kromm/public_html/wp-includes/pluggable.php on line 731

Warning: Cannot modify header information - headers already sent by (output started at /home/kromm/public_html/wp-config.php:1) in /home/kromm/public_html/wp-includes/pluggable.php on line 732

Warning: Cannot modify header information - headers already sent by (output started at /home/kromm/public_html/wp-config.php:1) in /home/kromm/public_html/wp-includes/pluggable.php on line 733

Warning: Cannot modify header information - headers already sent by (output started at /home/kromm/public_html/wp-config.php:1) in /home/kromm/public_html/wp-includes/pluggable.php on line 734

Warning: Cannot modify header information - headers already sent by (output started at /home/kromm/public_html/wp-config.php:1) in /home/kromm/public_html/wp-includes/pluggable.php on line 890

Za odpowiedź wielkie dzięki.
Pozdrawiam, Solve.