I'm trying to install Siremis  4.1 on Debian and whenever i open the URL in IE i get location.href='$url'"; exit; } ?> and in Firefox i see

<?php
if(is_file(dirname(__FILE__).'/install.lock')){
	include 'bin/_forward.php';	
}else{
	$script_name = $_SERVER['SCRIPT_NAME'];
	$url = str_replace("index.php","install/",$script_name);
	echo "<script>location.href='$url'</script>";
	exit;	
}
?>

I've verified the permissions of 

• siremis/log
• siremis/session
• siremis/files
  
• siremis/themes/default/template/cpl

files without success also no logs gets written to the logs file...please help to fix this issue...