Goto to that page in a normal webbrowser and you will see that that link and script isnt working anyway. I have tried going to the site off that page using the fopen and it works! The only thing you have to make sure of is that whenever you are getting your page (from fopen), make sure that its urlencoded.
(Here is all I did by the way:
<?php
$fp = fopen("http://c.moreover.com/click/here.pl?j31757706","r");
while(!feof($fp)) {
echo fgets($fp,5000);
}// end while
?>
).
By the way this discussion has been brought up before. If all else fails for you (it shouldnt though) Just use Curl. Its an overkill but it works
Hope this Helps!