(SOLVED) URGENT PLEASE HELP error

[hallakimoveis]

please help me , I tried to put meta tags on the site in the index and this appeared , I took and went up the old index and does not change , please I'm desperate

www.altotieteimoveis.com.br

Warning: session_start() [function.session-start]: Cannot send session cookie - headers already sent by (output started at /home/altotieteimoveis/public_html/index.php:2) in /home/altotieteimoveis/public_html/oc-includes/osclass/core/Session.php on line 47

[hallakimoveis]

I came back up and it worked