#14 cannot modify header information

[Anonymous]

This warning pops up on the top of my webpage. Did I
install it wrong or is this a legitimate bug?

Warning: Cannot modify header information - headers
already sent by (output started
at /srv/www/htdocs/qunoc/index.php:2)
in /srv/www/htdocs/webanalyse/include/stats_main.inc
on line 71