Warning: Cannot modify header information | Fresh install

Hi I have an error during a setup of a fresh installment of wordpress.

Warning: Cannot modify header information – headers already sent by (output started at /home/u4528102/domains/printr.se/public_html/new/wp-config.php:1) in /home/u4528102/domains/printr.se/public_html/new/wp-includes/pluggable.php on line 1173

I think i did all like following list but i cant still find the error of this. I also tried to use previous wordpress.

What should i do?