Spear Leaner

This error message:
Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent

When you receive this error message it usually means that you have a space before your opening tag. This space registers as content being printed onto the webpage, and thereby starts the page rendering process, or in other words it sends the header information to set up the webpage.

session_start() needs to be implemented before the headers are sent. So look for a random space before you

This will fire the error
1. 2.session_start();

This is correct
1.2.session_start();

notice the space on line 1!