please check ikbc.in its giving fatal error regarding session_start() | Forum

when we try to open ikbc.in, it gives fatal error ... here is error 

Fatal error: session_start() [<a href='function.session-start'>function.session-start</a>]: Failed to initialize storage module: files (path: ) in /home/ikbcin/public_html/ow_core/session.php on line 84

our system's phpinfo link given below 

PHPINFO