PHP can't read File

Hi, I have following script <?php $file_content = file ("./data/reserved.txt","r") or die("Unable to open file"); while(list($line_num,$line) = each ($file_content)) { $line = trim($line); echo "$line<br>"; } ?> at http://free.bizhat.com/test.php I get Unable to open file error. What should i do ? I use PHP 5 on Apache 2, anything with configuration ? My phpinfo() available at http://free.bizhat.com/phpinfo.php Regards, Yujin Boby