Curl conversion not working...

[AshleyQuick]

Can you spot anything I'm overlooking?

if(!file_exists($file) || filemtime($file) < time() - 3600) 
        {
            $ch = curl_init('http://www.mydomain.com/rss?p=' . urlencode($rpl) . '&u=' . urlencode($units['date']));
            @curl_setopt($ch, CURLOPT_HEADER, 0);
            //@curl_setopt($ch, CURLOPT_MUTE, 1);
            @curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
            $str = @curl_exec($ch);
            @curl_close($ch);
            $fp = @fopen($file,'w');
            @fwrite($fp,$str);
            @fclose($fp);
        }

    $this->data = @file_get_contents($file);

[NogDog]

If you're having problems, the first thing I'd suggest you do is get rid of all of the "@" error-suppression operators, so that you can see if PHP is trying to tell you anything. (If you don't want errors displayed to the screen in the production version, you can set the display_errors option to off in your configuration.)