config_cache/config_cache.php problem

[Tollecom]

This is the message, what can be wrong?

 

Warning: fopen(/home/s/supermix/config_cache/config_cache.php) [function.fopen]: failed to open stream: No such file or directory in /home/s/supermix/www/cgi-bin/admin/includes/configuration_cache.php on line 37

 

Warning: fwrite(): supplied argument is not a valid stream resource in /home/s/supermix/www/cgi-bin/admin/includes/configuration_cache.php on line 38

 

Warning: fclose(): supplied argument is not a valid stream resource in /home/s/supermix/www/cgi-bin/admin/includes/configuration_cache.php on line 39