No puedo logearme para administrar mi blog

Hola…hice algunos cambios en mi sitio http://www.elcoquimbano.cl en el que uso el tema Bounce. Sin embargo ahora no puedo modificarlo, me figuran los siguientes errores:

Warning: Cannot modify header information – headers already sent by (output started at /home/elcoquim/public_html/sitio/wp-includes/pluggable.php:2) in /home/elcoquim/public_html/sitio/wp-includes/pluggable.php on line 701

Warning: Cannot modify header information – headers already sent by (output started at /home/elcoquim/public_html/sitio/wp-includes/pluggable.php:2) in /home/elcoquim/public_html/sitio/wp-includes/pluggable.php on line 702

Warning: Cannot modify header information – headers already sent by (output started at /home/elcoquim/public_html/sitio/wp-includes/pluggable.php:2) in /home/elcoquim/public_html/sitio/wp-includes/pluggable.php on line 703

Warning: Cannot modify header information – headers already sent by (output started at /home/elcoquim/public_html/sitio/wp-includes/pluggable.php:2) in /home/elcoquim/public_html/sitio/wp-includes/pluggable.php on line 706

Warning: Cannot modify header information – headers already sent by (output started at /home/elcoquim/public_html/sitio/wp-includes/pluggable.php:2) in /home/elcoquim/public_html/sitio/wp-includes/pluggable.php on line 707

Warning: Cannot modify header information – headers already sent by (output started at /home/elcoquim/public_html/sitio/wp-includes/pluggable.php:2) in /home/elcoquim/public_html/sitio/wp-includes/pluggable.php on line 708

Warning: Cannot modify header information – headers already sent by (output started at /home/elcoquim/public_html/sitio/wp-includes/pluggable.php:2) in /home/elcoquim/public_html/sitio/wp-includes/pluggable.php on line 709

Warning: Cannot modify header information – headers already sent by (output started at /home/elcoquim/public_html/sitio/wp-includes/pluggable.php:2) in /home/elcoquim/public_html/sitio/wp-includes/pluggable.php on line 712

Warning: Cannot modify header information – headers already sent by (output started at /home/elcoquim/public_html/sitio/wp-includes/pluggable.php:2) in /home/elcoquim/public_html/sitio/wp-includes/pluggable.php on line 713

Warning: Cannot modify header information – headers already sent by (output started at /home/elcoquim/public_html/sitio/wp-includes/pluggable.php:2) in /home/elcoquim/public_html/sitio/wp-includes/pluggable.php on line 714

Warning: Cannot modify header information – headers already sent by (output started at /home/elcoquim/public_html/sitio/wp-includes/pluggable.php:2) in /home/elcoquim/public_html/sitio/wp-includes/pluggable.php on line 715

Alguien me podría ayudar. El sitio se ve pero no puedo administrarlo.