What is wrong with this script???

Hello frz, i have following script files. Actually it is a login stystem script. The purpose of this program is to allow user to login. After login they enter in a page where they can go to protected area after clicking the link. If user cookie is set then he can go to the protected area otherwise he will be redirected to login page. This program runs well when user cookie is not set but when the cookie is set, then page doesn't redirect to the destination. Plz help me. Here are the code files -

File No.1 LoginDesg.php -

<html>

<head>

<title>LoginDesg</title>

</head>

<body>

<form id="form1" name="form1" method="post" action="LoginCode.php">

<table width="25%" align="center">

<tr>

<th><div align="right">Username: </div></th>

<td><input type="text" name="txtuname" id="txtuname" /></td>

</tr>

<tr>

<th><div align="right">Password: </div></th>

<td><input type="password" name="txtpass" id="txtpass" /></td>

</tr>

<tr>

<th><div align="right">Remember me: </div></th>

<td><input type="checkbox" name="chk" id="chk" /></td>

</tr>

<tr>

<th><div align="right">

<input type="submit" class="btn" name="btnlogin" id="btnlogin" value="Login" />

</div></th>

<td></td>

</tr>

</table>

</form>

</body>

</html>

File No.2 -

<?php

$uname=$_REQUEST["txtuname"];

$pass=$_REQUEST["txtpass"];

if($uname=="test" && $pass==12345)

{

    if(isset($_REQUEST["chk"]))

        {

            setcookie("uname",$uname,time()+60*60*24);

        }

        header("location:Account.php");

}

else

{

    header("location:LoginDesg.php");

}            

?>

File No. 3 -

<html>

<head>

<title>Account</title>

</head>

<body style="text-align:center">

<div>

<?php

$uname=$_COOKIE["uname"];

if(isset($_COOKIE["uname"]))

{

    echo "You are logged in as $uname.";

}

else

{

        echo "You entered here as a guest<p>";

}

?>

</div>

<h3>Member Area</h3>

<a href="ProtectedArea.php">Go to member area</a>

</body>

</html>

File No. 4 -

<?php

if(isset($_COOKIE["uname"]))

{

    header("location:ProtectedArea.php");

}

else

{

    header("location:LoginDesg.php");    

}

?>

File No. 5 -

<?php

include("CheckLogin.php");

?>

<html>

<head>

<title>Protected Area</title>

</head>

<body style="text-align:center">

<h1>Welcome to protected area</h1>

</body>

</html>

Note -

Username is "test" and password is "12345";

In IE the page is loading and loading and in Firfox following msg appears -