CURL can't connect? Just hangs and doesn't respond. PHP has it enabled

[Upreme]

I have a simple PHP function on a friend server which I've checked and has PHP CURL enabled. The function is: \[code\]function sw_fetch_code($apikey='',$email=''){ $url = "http://www.domain.com/xxx/api.php?getcode=1&apikey=".$apikey."&email=".$email.""; $ch = curl_init(); curl_setopt($ch, CURLOPT_URL, $url); curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); curl_setopt($ch, CURLOPT_HEADER, 1); $result = curl_exec($ch); curl_close($ch); $obj = json_decode($result); if(!empty($obj)){ if($obj->status == 200){ return $obj->code; }else{ return $obj->status; } }}\[/code\]As you can see this is very simple and I've tested it and works on localhost and internal to my own server. The url returns as expected. However it just doesn't give any response when this function is called on my friends server.Any ideas what could cause this?Thanks,Stefan