http://php.s3.to/chat/
ここにある高速チャットを設置すると以下のようなエラーメッセージが出るんですが
どうすればうまく行きますか?

Warning: session_start(): open(/tmp\sess_7bede8e58cf70ade30189aa799a60b24, O_RDWR) failed: No such file or directory (2) in C:\home\chat.php on line 2

Warning: session_start(): Cannot send session cookie - headers already sent by (output started at C:\home\chat.php:2) in C:\home\chat.php on line 2

Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at C:\home\chat.php:2) in C:\home\chat.php on line 2

Warning: Unknown(): open(/tmp\sess_7bede8e58cf70ade30189aa799a60b24, O_RDWR) failed: No such file or directory (2) in Unknown on line 0

Warning: Unknown(): Failed to write session data (files). Please verify that the current setting of session.save_path is correct (/tmp) in Unknown on line 0