sessions

I've installed Apache 2 and PHP 5 on Windows XP, and I'm having some issues with sessions. Everything else I've tried to do in PHP works fine, but for some reason every time I try to use session_start() i get the following errors: Warning: session_start() [function.session-start]: open(C:\PHP\sessiondata\sess_29eb1a211c118cc8083168f24e32ee75, O_RDWR) failed: No such file or directory (2) in C:\Program Files\Apache Group\Apache2\htdocs\Games\main.php on line 3 Warning: session_start() [function.session-start]: Cannot send session cookie - headers already sent by (output started at C:\Program Files\Apache Group\Apache2\htdocs\Games\main.php:3) in C:\Program Files\Apache Group\Apache2\htdocs\Games\main.php on line 3 Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at C:\Program Files\Apache Group\Apache2\htdocs\Games\main.php:3) in C:\Program Files\Apache Group\Apache2\htdocs\Games\main.php on line 3 Any suggestions? Sam