Unable to login

Hi, I would like to have you help on your theme. When i try to login it gives me this feedback:

Warning: Cannot modify header information - headers already sent by (output started at /home/varal/public_html/wp/wp-content/themes/full-frame child/functions.php:1) in /home/varal/public_html/wp/wp-login.php on line 425

Warning: Cannot modify header information - headers already sent by (output started at /home/varal/public_html/wp/wp-content/themes/full-frame child/functions.php:1) in /home/varal/public_html/wp/wp-login.php on line 438

Warning: Cannot modify header information - headers already sent by (output started at /home/varal/public_html/wp/wp-content/themes/full-frame child/functions.php:1) in /home/varal/public_html/wp/wp-includes/pluggable.php on line 925

Warning: Cannot modify header information - headers already sent by (output started at /home/varal/public_html/wp/wp-content/themes/full-frame child/functions.php:1) in /home/varal/public_html/wp/wp-includes/pluggable.php on line 926

Warning: Cannot modify header information - headers already sent by (output started at /home/varal/public_html/wp/wp-content/themes/full-frame child/functions.php:1) in /home/varal/public_html/wp/wp-includes/pluggable.php on line 927

Warning: Cannot modify header information - headers already sent by (output started at /home/varal/public_html/wp/wp-content/themes/full-frame child/functions.php:1) in /home/varal/public_html/wp/wp-includes/pluggable.php on line 1196

The first 2 warnings appear before i try to login. The next 3, together with the other 2, appear when i try to login. I can enter the wordpress if i rename/delete the function.php inside the "full_frame child" folder then, after logging in, i rename/resend it back to the folder and the theme works just fine. If i logout then login, the problem persist. Any idea? http://varalstudio.com.br/wp/wp-login.php Thanks in advance.