I'm unfamiliar with all the PHP & MySQL stuff, I only know the basics.

OK, my problem is the next one:

I want one blog in WordPress, and I try to install it, but when I guess I've done it, in the wp_login it appears the next error:

CODE
Warning: Cannot modify header information - headers already sent by (output started at /www/zxq.net/d/s/p/dsplay/htdocs/wp-config.php:1) in /www/zxq.net/d/s/p/dsplay/htdocs/wp-login.php on line 12

Warning: Cannot modify header information - headers already sent by (output started at /www/zxq.net/d/s/p/dsplay/htdocs/wp-config.php:1) in /www/zxq.net/d/s/p/dsplay/htdocs/wp-login.php on line 24


And when I want to login, it appears the next message:

CODE
ERROR: WordPress requires Cookies but your browser does not support them or they are blocked.


And I'm sure that my Firefox admits it.

My website/blog is:
CODE
http://dsplay.zxq.net/


It looks like works OK, but I can't log in... someone gaves me help?