Warning: Cannot modify header information

[leemoran]

I am trying to set up the plug in and have run into this issue

Warning: Cannot modify header information - headers already sent by (output started at /home8/goseecha/public_html/instantwebservices/wp-content/themes/MyProduct/page.php:4) in /home8/goseecha/public_html/instantwebservices/wp-includes/pluggable.php on line 897

URL: http://www.instantwebservices.com/protected-page

I have searched the forums and found similar issues but my files look fine

Suggestions?

[Cristián Lávaque]

The theme file mentioned seems to have a space or line bread outside the PHP tags (<?php ... ?>), which results in an early output to the browser and is causing trouble later on in the script.