Грешка при вписване

Здравейте,
излиза ми следтана грешка
Warning: Cannot modify header information – headers already sent by (output started at /home/i12/public_html/wp-config.php:1) in /home/i12/public_html/wp-login.php on line 353

Warning: Cannot modify header information – headers already sent by (output started at /home/i12/public_html/wp-config.php:1) in /home/i12/public_html/wp-login.php on line 365
до колкото зная проблема е във файла wp-config и четох, че трябва да се види дали има празни пространства пред и след <?php, но в края на файла няма ?>. Позволява ми да се впиша, но след това ми дава още три грешки

Warning: Cannot modify header information – headers already sent by (output started at /home/i12/public_html/wp-config.php:1) in /home/i12/public_html/wp-includes/pluggable.php on line 737

Warning: Cannot modify header information – headers already sent by (output started at /home/i12/public_html/wp-config.php:1) in /home/i12/public_html/wp-includes/pluggable.php on line 738

Warning: Cannot modify header information – headers already sent by (output started at /home/i12/public_html/wp-config.php:1) in /home/i12/public_html/wp-includes/pluggable.php on line 739

Warning: Cannot modify header information – headers already sent by (output started at /home/i12/public_html/wp-config.php:1) in /home/i12/public_html/wp-includes/pluggable.php on line 934.

Много ще съм благодарна, ако можете да ми помогнете .