I changed the hole way the page works thats i took out the login process from the header and added links but ob those links i still added the check if user is logged in or not if he is logged in hide the links to sign up and login and show users name and profile link
every page on the site now has this
Warning: session_start() [function.session-start]: Cannot send session cookie - headers already sent by (output started at C:\xampp\htdocs\xxxxx\servicios.php:89) in C:\xampp\htdocs\xxxxx\WA_SecurityAssist\Helper_PHP.php on line 5
Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at C:\xampp\htdocs\xxxxxx\servicios.php:89) in C:\xampp\htdocs\xxxxxx\WA_SecurityAssist\Helper_PHP.php on line 5
The only pages that dont show that message are the ones that have ecart behavoir guess cause they start their own session on each of those.
If i remove the check if user is logged from the header file the error desapears.