Error about header

I extract all files form folden in my server now i get this error see:
Warning: Cannot modify header information – headers already sent by (output started at /srv/disk11/1121984/www/zanimljivosti.me.pn/wp-config.php:1) in /srv/disk11/1121984/www/zanimljivosti.me.pn/wp-includes/pluggable.php on line 881

http://zanimljivosti.me.pn/

(im form serbia)