Errors while trying to go to http:\\localhost\cacti

[Rahvin]

ive installed Cacti on a windows 2k server sp3 with iis5
cacti-0.8.1 and the lastest mysql and php and i get the following errors when i go to http:\\localhost\cacti

anyone here know the solution ?

Warning: session_start() [function.session-start]: open(/tmp\sess_00ce919c911949618a2935d28af2933b, O_RDWR) failed: No such file or directory (2) in D:\Apps\cacti\include\auth.php on line 34

Warning: session_start() [function.session-start]: Cannot send session cookie - headers already sent by (output started at D:\Apps\cacti\include\auth.php:34) in D:\Apps\cacti\include\auth.php on line 34

Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at D:\Apps\cacti\include\auth.php:34) in D:\Apps\cacti\include\auth.php on line 34

Warning: Cannot modify header information - headers already sent by (output started at D:\Apps\cacti\include\auth.php:34) in D:\Apps\cacti\include\auth.php on line 38