Redirection not working!

<?php

if(isset($_POST["Login"]))
{
if ($_POST["username"]=="" || $_POST["password"]=="")
{
 echo "<script>alert('You need to provide a username and password!')</script>";
}
else
{
$user_name=$_POST["username"];
$password=$_POST["password"];
$q = "SELECT name,status FROM info WHERE email_id='$user_name' AND pass='$password'";
$data=mysql_query($q,$con) or die("Error in Query: " . mysql_error());
$num=mysql_fetch_array($data);
if(!$num)
{
echo "<script>alert('Sorry! E-Mail Id and Password donot match!')</script>";
}
else
{
$uname=$num['name'];
$ustatus=$num['status'];
if($ustatus=='lock')
{
echo "<script>alert('You Are Currently block Contact for more details!')</script>";
}
else
{

$_SESSION["user_name"]= $uname;
$_SESSION["user_email"]=$user_name;
header('Location:http://www.mysite.com/');
}
}

}
}
else
{}

<?php
if(isset($_POST["Submit"]))

{
$user_name=$_POST["username"];
$password=$_POST["password"];
if (!$_POST["username"] || !$_POST["password"])
        {
        die("You need to provide a username and password.");
        }

    // Create query

  $q = "SELECT * FROM info WHERE email_id='".$_POST["username"]."' AND pass='".$_POST["password"]."'";

  // Run query
  $r = mysql_query($q);
  if ( $obj = @mysql_fetch_object($r) )
   {
	$status=$obj->status;
		if($status=='lock')
         {
          echo "<script>alert('You Are Currently block Contact for more details!')</script>";
         }
         else
          {
        $_SESSION["user_name"]= $obj->name;
       $_SESSION["user_email"]=$obj->email_id;
            header("Location:http://www.mysite.com/index.php");
          }
   }
  else
        {

       // Login not successful

      echo "<script>alert('Sorry, could not log you in. Wrong login informatio.')</script>";

	          }


}

else{

}