Parallel Loading System – 0.1.9.1 Not working!

I have Parallel Loading System – 0.1.9.1 plugin installed and I set up a subdomain with it but I get this message:
Warning: get_headers() [function.get-headers]: php_network_getaddresses: getaddrinfo failed: Name or service not known in /home/content/44/8547944/html/ezstarcraft/wp-content/plugins/parallel-loading-system/wp-pls.php on line 147

Warning: get_headers(http://images.ezstarcraft.com/wp-content/plugins/parallel-loading-system/check_headers.jpg) [function.get-headers]: failed to open stream: php_network_getaddresses: getaddrinfo failed: Name or service not known in /home/content/44/8547944/html/ezstarcraft/wp-content/plugins/parallel-loading-system/wp-pls.php on line 147

I have no idea how to work this. Anyone know?