Headers problem

Warning: Cannot modify header information – headers already sent by (output started at /home/travilla/public_html/blog/wp-config.php:1) in /home/travilla/public_html/blog/wp-admin/install.php on line 36

I’m a newbie to wordpress and I’m trying to install wordpress 2.7,
I have checked the files for white spaces, and get this error.
Hope you can give me a hint.

Thanks