Autoblog

How to enable Autoblog in the main site only, and not available to subdomain sites? Or is is possible to turn off/on this feature for the subdomain sites?

Right now my main site is working ok but when I go to subdomain site autoblog. I got the following errors:

Warning: fopen() [function.fopen]: php_network_getaddresses: getaddrinfo failed: Name or service not known in /home/kingnet/public_html/wp-includes/functions.php on line 4165

Warning: fopen(http://test007.king.net/wp-content/mu-plugins/autoblog.php) [function.fopen]: failed to open stream: php_network_getaddresses: getaddrinfo failed: Name or service not known in /home/kingnet/public_html/wp-includes/functions.php on line 4165

Warning: fread(): supplied argument is not a valid stream resource in /home/kingnet/public_html/wp-includes/functions.php on line 4168

Warning: fclose(): supplied argument is not a valid stream resource in /home/kingnet/public_html/wp-includes/functions.php on line 4171