pr checker gives -1 for every site..

this is a part of the code i used.. what is wrong with it?

function GooglePageRank($url){
    $arr = parse_url($url);
    $url = $arr['host'];
    $url="info:".$url; $ch=GoogleCSum($url,0xE6359A60);
    $host="toolbarqueries.google.com"; $hostip=gethostbyname($host);
    $query ="GET /search?client=navclient-auto&ch=6".$ch."&ie=UTF-8&oe=UTF-8&features=Rank&q=".rawurlencode($url)." HTTP/1.0\r\n";
    $query.="Host: $host\r\n"; 
        $rank=-1;
    $query.="User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)\r\n";
    $query.="Connection: Close\r\n\r\n";
    $fp=fsockopen($hostip,80,$errno,$errstr,30);
    if ($fp)
    { fputs($fp,$query); $data=""; while (!feof($fp)) $data.=fgets($fp,4096); fclose($fp);
    $data=explode("\n",$data);
    foreach ($data as $line)
    if (!is_bool(strpos($line,"Rank_1")))
    { $rank=explode(":",trim($line)); $rank=$rank[2]; break; } }
    return $rank; 
}

function GoogleCSum($s,$key){
    $v4=$len=strlen($s); $esi=$key; $ebx=$edi=0x9E3779B9; $p=0;
    if ($len>=12)
    for($i=0;$i<floor($len/12);$i++)
    { $edi=unsign($edi+ord($s[$p+4])+(ord($s[$p+5]) << 8)+(ord($s[$p+6]) << 16)+(ord($s[$p+7]) << 24));
    $esi=unsign($esi+ord($s[$p+8])+(ord($s[$p+9]) << 8)+(ord($s[$p+10]) << 16)+(ord($s[$p+11]) << 24));
    $edx=unsign(($ebx+ord($s[$p+0])+(ord($s[$p+1]) << 8)+(ord($s[$p+2]) << 16)+(ord($s[$p+3]) << 24)-$edi-$esi)^shr($esi,13));
    $edi=unsign(($edi-$esi-$edx)^($edx << 8));
    $esi=unsign(($esi-$edx-$edi)^shr($edi,13));
    $edx=unsign(($edx-$edi-$esi)^shr($esi,12));
    $edi=unsign(($edi-$esi-$edx)^($edx << 16));
    $esi=unsign(($esi-$edx-$edi)^shr($edi,5));
    $edx=unsign(($edx-$edi-$esi)^shr($esi,3)); $ebx=$edx;
    $edi=unsign(($edi-$esi-$ebx)^($ebx << 10));
    $esi=unsign(($esi-$ebx-$edi)^shr($edi,15));
    $v4-=12; $p+=12; }
    $esi=unsign($esi+$len);
    if ($v4>=11) $esi=unsign($esi+(ord($s[$p+10]) << 24));
    if ($v4>=10) $esi=unsign($esi+(ord($s[$p+9]) << 16));
    if ($v4>=9) $esi=unsign($esi+(ord($s[$p+8]) << 8));
    if ($v4>=8) $edi=unsign($edi+ord($s[$p+4])+(ord($s[$p+5]) << 8)+(ord($s[$p+6]) << 16)+(ord($s[$p+7]) << 24));
    else
    { if ($v4>=7) $edi=unsign($edi+(ord($s[$p+6]) << 16));
    if ($v4>=6) $edi=unsign($edi+(ord($s[$p+5]) << 8));
    if ($v4>=5) $edi=unsign($edi+ord($s[$p+4])); }
    if ($v4>=4) $ebx=unsign($ebx+ord($s[$p+0])+(ord($s[$p+1]) << 8)+(ord($s[$p+2]) << 16)+(ord($s[$p+3]) << 24));
    else
    { if ($v4>=3) $ebx=unsign($ebx+(ord($s[$p+2]) << 16));
    if ($v4>=2) $ebx=unsign($ebx+(ord($s[$p+1]) << 8));
    if ($v4>=1) $ebx=unsign($ebx+ord($s[$p+0])); }
    $ebx=unsign(($ebx-$edi-$esi)^shr($esi,13));
    $edi=unsign(($edi-$esi-$ebx)^($ebx << 8));
    $esi=unsign(($esi-$ebx-$edi)^shr($edi,13));
    $ebx=unsign(($ebx-$edi-$esi)^shr($esi,12));
    $edi=unsign(($edi-$esi-$ebx)^($ebx << 16));
    $esi=unsign(($esi-$ebx-$edi)^shr($edi,5));
    $ebx=unsign(($ebx-$edi-$esi)^shr($esi,3));
    $edi=unsign(($edi-$esi-$ebx)^($ebx << 10));
    $esi=unsign(($esi-$ebx-$edi)^shr($edi,15)); return $esi; 
}
function shr($x,$y) { 
    $x=unsign($x); 
    for($i=0;$i<$y;$i++) $x=floor($x/2); return $x; 
}
function unsign($l) { 
    $l=intval($l);
    if ($l>=0){
        return $l;
    }else{
        return 4294967296+$l;
    }
}

Code (markup):

i don't have any idea.. i bought this script from someone and changed nothing about it.

 

I'd imagine either your IP's being ignored or the checksum algorithm has been updated since that script was written.

 

then i think my ip is being ignored.. because the same script works on a different site (www.myprchecker.com).

what to do about it?