When logging in get a cannot modify header warning

Hello all, whenever I try to log into my wordpress from another computer I get warnings such as:

Warning: Cannot modify header information – headers already sent by (output started at /home/easyweig/public_html/wp-content/plugins/adsense.php:114) in /home/easyweig/public_html/wp-includes/functions.php on line 1650

Do I have to comment out the headers that are giving me warnings or is my adsense plugin wrong?

Thanks!