Fejl ved Cron job..

Scriptet er følgende:
<?php include_once("connect.php"); ?>

<?php
    function get_conversion($cur_from,$cur_to){
            if(strlen($cur_from)==0){
                $cur_from = "USD";
            }
            if(strlen($cur_to)==0){
                $cur_from = "PHP";
            }
            $host="download.finance.yahoo.com";
            $fp = @fsockopen($host, 80, $errno, $errstr, 30);
            if (!$fp)
            {
                $errorstr="$errstr ($errno)<br />\n";
                return false;
            }
            else
            {
                $file="/d/quotes.csv";
                $str = "?s=".$cur_from.$cur_to."=X&f=sl1d1t1ba&e=.csv";
                $out = "GET ".$file.$str." HTTP/1.0\r\n";
                $out .= "Host: download.finance.yahoo.com\r\n";
                $out .= "Connection: Close\r\n\r\n";
                @fputs($fp, $out);
                while (!@feof($fp))
                {
                    $data .= @fgets($fp, 128);
                }
                @fclose($fp);
                @preg_match("/^(.*?)\r?\n\r?\n(.*)/s", $data, $match);
                $data =$match[2];
                $search = array ("'<script[^>]*?>.*?</script>'si","'<[\/\!]*?[^<>]*?>'si","'([\r\n])[\s]+'","'&(quot|#34);'i","'&(amp|#38);'i","'&(lt|#60);'i","'&(gt|#62);'i","'&(nbsp|#160);'i","'&(iexcl|#161);'i","'&(cent|#162);'i","'&(pound|#163);'i","'&(copy|#169);'i","'&#(\d+);'e");
                $replace = array ("","","\\1","\"","&","<",">"," ",chr(161),chr(162),chr(163),chr(169),"chr(\\1)");
                $data = @preg_replace($search, $replace, $data);
                $result = split(",",$data);
                return $result[1];
            }//else
    }//end get_conversion
   
    $x = get_conversion($_GET['from'],$_GET['to']);
    $vaerdi = $x * $_GET['val'];
   
    // Posting til MySQL

    {
        mysql_query("UPDATE valutaliste SET vaerdi = '$vaerdi' WHERE id = '$_GET[id]'") or die(mysql_error());
        print "<b>Fuldført.</b>";
    }
   
    // convert.php?id=1&val=1&from=USD&to=EUR
   
       
    ?>

Og bliver f.eks. hentet ved convert.php?id=1&val=1&from=USD&to=EUR...
Når jeg indtaster URL'en virker det og den skriver til databasen, men med cron jobbet resulterer det i at værdierne bliver 0, og jeg får følgende fejl fra error_log:

[Tue Aug 26 18:06:53 2008] [error] [client 93.160.112.227] PHP Notice: Undefined index: from in /var/www/vhosts/dolarcambio.es/httpdocs/convert.php on line 41
[Tue Aug 26 18:06:53 2008] [error] [client 93.160.112.227] PHP Notice: Undefined index: to in /var/www/vhosts/dolarcambio.es/httpdocs/convert.php on line 41
[Tue Aug 26 18:06:53 2008] [error] [client 93.160.112.227] PHP Notice: Undefined variable: data in /var/www/vhosts/dolarcambio.es/httpdocs/convert.php on line 28
[Tue Aug 26 18:06:53 2008] [error] [client 93.160.112.227] PHP Notice: Undefined index: val in /var/www/vhosts/dolarcambio.es/httpdocs/convert.php on line 42
[Tue Aug 26 18:06:53 2008] [error] [client 93.160.112.227] PHP Notice: Undefined index: id in /var/www/vhosts/dolarcambio.es/httpdocs/convert.php on line 47