facebook integration

Hi there

I've tried to load the Ultimate Facebook plugin, but I get the following code all along the top of my site - I've tried it using UF as well as the generic FB plugin.

Code I get is: Warning: session_start(): open(/var/php_sessions/sess_423a8822206a89a560c33f741db5a9e7, O_RDWR) failed: No such file or directory (2) in /hermes/bosweb/web043/b435/ipg.cratar/tarynhayes/wp-content/plugins/facebook/includes/facebook-php-sdk/facebook.php on line 51 Warning: session_start(): Cannot send session cookie - headers already sent by (output started at /hermes/bosweb/web043/b435/ipg.cratar/tarynhayes/wp-content/plugins/facebook/includes/facebook-php-sdk/facebook.php:51) in /hermes/bosweb/web043/b435/ipg.cratar/tarynhayes/wp-content/plugins/facebook/includes/facebook-php-sdk/facebook.php on line 51 Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /hermes/bosweb/web043/b435/ipg.cratar/tarynhayes/wp-content/plugins/facebook/includes/facebook-php-sdk/facebook.php:51) in /hermes/bosweb/web043/b435/ipg.cratar/tarynhayes/wp-content/plugins/facebook/includes/facebook-php-sdk/facebook.php on line 51 Warning: Cannot modify header information - headers already sent by (output started at /hermes/bosweb/web043/b435/ipg.cratar/tarynhayes/wp-content/plugins/facebook/includes/facebook-php-sdk/facebook.php:51) in /hermes/bosweb/web043/b435/ipg.cratar/tarynhayes/wp-includes/pluggable.php on line 881 Warning: Unknown: open(/var/php_sessions/sess_423a8822206a89a560c33f741db5a9e7, 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 (/var/php_sessions) in Unknown on line