Should anybody have the same errors (as I had):
Warning: session_start() [function.session-start]: open(/tmp\sess_caf7376f5e5cb64d4d960e34106e2907, O_RDWR) failed: No such file or directory (2) in C:\Inetpub\wb\admin\logout\index.php on line 35
Warning: session_start() [function.session-start]: Cannot send session cookie - headers already sent by (output started at C:\Inetpub\wb\admin\logout\index.php:35) in C:\Inetpub\wb\admin\logout\index.php on line 35
Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at C:\Inetpub\wb\admin\logout\index.php:35) in C:\Inetpub\wb\admin\logout\index.php on line 35
Warning: session_destroy() [function.session-destroy]: Session object destruction failed in C:\Inetpub\wb\admin\logout\index.php on line 47
Warning: Cannot modify header information - headers already sent by (output started at C:\Inetpub\wb\admin\logout\index.php:35) in C:\Inetpub\wb\admin\logout\index.php on line 49
create the directory "C:\tmp"
it seems like there was a problem with the sess.save_path in the php config, i tried to find another solution, but this was the only one that worked...