подключение скрипта от дос

Warning: fopen(anti_ddoscheck.txt) [function.fopen]: failed to open stream: Permission denied in /home/la2cel/public_html/сайт.ru/anti_ddos/index.php on line 40

if ($ad_num_query>=$ad_ddos_query){
$ad_file=fopen("{$ad_dir}/{$ad_check_file}","w");
$ad_end_defense=$ad_date+$ad_defense_time;
$ad_string='<?php $ad_end_defense='.$ad_end_defense.'; ?>';
@fputs($ad_file,$ad_string);
@fclose($ad_file);
} else {
$ad_file=fopen("{$ad_dir}/{$ad_check_file}","w");    // 40 строка
$ad_string='<?php $ad_num_query='.$ad_num_query.';
$ad_sec_query='.$ad_sec.'; ?>';
@fputs($ad_file,$ad_string);
@fclose($ad_fp);
}
}
?>

Warning: session_start() [function.session-start]: Cannot send session cookie - headers already sent by (output started at /home/la2cel/public_html/сайт.ru/anti_ddos/index.php:40) in /home/la2cel/public_html/сайт.ru/index.php on line 12