Problems with Headers?

Warning: session_start() [function.session-start]: Cannot send session cookie - headers already sent by (output started at /home/frenchel/public_html/plugins/mobile/terawurfl/TeraWurfl.php:293) in /home/frenchel/public_html/libraries/joomla/session/session.php on line 539

Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at /home/frenchel/public_html/plugins/mobile/terawurfl/TeraWurfl.php:293) in /home/frenchel/public_html/libraries/joomla/session/session.php on line 539

Warning: Cannot modify header information - headers already sent by (output started at /home/frenchel/public_html/plugins/mobile/terawurfl/TeraWurfl.php:293) in /home/frenchel/public_html/components/com_community/libraries/core.php on

It means that jos_TeraWurflCache table contain incorrect data. So, either trancate that table, or disable caching in Mobile-TeraWurfl plugin.