When you wish to sign up using aMember (my signup page is at http://electrobase.com/plus/signup.php) , you enter your information, click 'Continue', read the User Agreement, and then when you check 'I Agree' and click 'Continue', you get the following error message: Warning : Cannot modify header information - headers already sent by (output started at /usr/local/apache/htdocs/plus/signup.php:1) in /usr/local/apache/htdocs/plus/plugins/payment/paypal_r/paypal_r.inc.php on line 232 Any suggestions?