求组，后台后法登录

进入wp-login.php登录页面，显示：Warning: Cannot modify header information – headers already sent by (output started at /home/songcn/public_html/wp-config.php:1) in /home/songcn/public_html/wp-login.php on line 353
Warning: Cannot modify header information – headers already sent by (output started at /home/songcn/public_html/wp-config.php:1) in /home/songcn/public_html/wp-login.php on line 365

下面有登录框，输入点登录后显示：Warning: Cannot modify header information – headers already sent by (output started at /home/songcn/public_html/wp-config.php:1) in /home/songcn/public_html/wp-login.php on line 353

Warning: Cannot modify header information – headers already sent by (output started at /home/songcn/public_html/wp-config.php:1) in /home/songcn/public_html/wp-login.php on line 365

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

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

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

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

地址：song4.cn
哪位知道什么原因，说一下解决方法，十分感谢。