Getting cURL to access this site

I'm trying to make a cool little script that reads the shoutbox on a site, and makes automatic replies with a AI API. However, when I try to access the site in cURL, it's as if it's getting blocked or something.

curl_setopt($ch, CURLOPT_REFERER, 'http://nodusgriefing.com/index.php');
curl_setopt($ch, CURLOPT_USERAGENT, 'Mozilla/5.0 (Windows NT 6.1; WOW64; rv:14.0) Gecko/20100101 Firefox/14.0.1');

As you can see, I did try setting the user agent; however, it was to no avail. All I see is a blank page, and the tab title is just "->". 

Any ideas on how I can go about this?