Warning: curl_setopt(): Unable to access

<?php
$url = 'http://www.livescore.com/default.dll';
$cookie_file_name = "/tmp/cookie.txt";
$curl = curl_init();
curl_setopt($curl, CURLOPT_COOKIEJAR, $cookie_file_name);
curl_setopt($curl, CURLOPT_FOLLOWLOCATION, 1);
curl_setopt($curl, CURLOPT_URL, $url);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
curl_setopt($curl, CURLOPT_HEADER, true);
$str = curl_exec($curl);
unset($curl);
$ch = curl_init();
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_COOKIEFILE, $cookie_file_name);
curl_setopt($ch, CURLOPT_URL, $url);
$buf2 = curl_exec($ch);
curl_close($ch);
$pos1 = '<tr bgcolor="#333333"><td class="title" colspan="4" height="18">&nbsp;<b>';
$pos2 = '<tr bgcolor="#111111"><td colspan="4" height="4"></td></tr></table>';
$buf3 = substr($buf2, strpos($buf2, "$pos1"));
$buf3 = substr($buf3, 0, strpos($buf3, "$pos2"));
echo "$buf3";
?>