Two warnings related to wrapper issue

I’ve just started using this plugin. I managed to add an IP address to my blacklist but also got this message, which I’ll paste below, substituting a couple of identifying details with “NAMEREMOVEDBYME”:

Warning: file_get_contents() [function.file-get-contents]: http:// wrapper is disabled in the server configuration by allow_url_fopen=0 in /home/NAMEREMOVEDBYME/public_html/NAMEREMOVEDBYME/wp-content/plugins/ip-blacklist-cloud/ip_blacklist_cloud.php on line 2800

Warning: file_get_contents(http://ip-finder.me/wp-content/themes/ipfinder/blacklist_add.php?IP=188.143.234.53&website=http%3A%2F%2NAMEREMOVEDBYME.com%2Fwp&website_name=NAMEREMOVEDBYME+NAMEREMOVEDBYME+%E6%9B%B9%E5%8B%B5%E5%96%84) [function.file-get-contents]: failed to open stream: no suitable wrapper could be found in /home/NAMEREMOVEDBYME/public_html/NAMEREMOVEDBYME/wp-content/plugins/ip-blacklist-cloud/ip_blacklist_cloud.php on line 2800

http://wordpress.org/plugins/ip-blacklist-cloud/