$_Session not storing on first attemp

Please help me on my coding im having problem with the session which only storing the session on second on the first it just not storing any session

<?php



//session_id($sid);



session_start();

ob_start();

if(!isset($_SESSION['ddc']['cartqty'])) $_SESSION['ddc']['cartqty'] = 0;

if(!isset($_SESSION['ddc']['price'])) $_SESSION['ddc']['price'] = 0.00;



include('includes/config.php');

include('includes/functions.php');

include('includes/header.php');

$msearch = $_GET['search'];

$_SESSION['msr']="$msearch";

?>



<?php
session_start();
if ($_SESSION['sort'] == ""){
$_SESSION['sort']="ORDER BY name";
$_SESSION['sortby']="ASC";
$_SESSION['view']="12";
}

echo $_SESSION['msr']
?>



<div class="clear"></div>

<div id="menulisting">
<div style="margin-bottom : 10px">
<a href="mobilesms.php">
<img id="mobile" src="assets/images/mobilesms.jpg" style="border: 0px none;"></a>
</div>

<?php include('includes/menu.php'); ?>
<p>
</p>
<iframe src="http://www.facebook.com/plugins/likebox.php?href=http%3A%2F%2Fwww.facebook.com%2Fpages%2FDonkeez%2F147416101995311&amp;width=180&amp;colorsc heme=light&amp;show_faces=true&amp;border_color&amp;stream=false&amp;header=false&amp;height=250" scrolling="no" frameborder="0" style="border:none; overflow:hidden; width:180px; height:250px;" allowTransparency="true"></iframe>
</div>



<div id="productlisting" style="border: 0px none;">



<div id="intcategories">

<div id="categoryname"><h>Product Search</h></div>
<div id="new">New product
</div>

<div id="newproduct">
<marquee behavior="scroll" scrolldelay="100" direction="left" onmouseover="this.stop();" onmouseout="this.start();" style="height: 50px;"> <div id="newproduct1">
<?php


$sql3 = "SELECT * FROM ddcart_products ORDER BY id DESC LIMIT 0,8";
$result3 = mysql_query($sql3);
while($data3 = mysql_fetch_assoc($result3)) {
?>
<img src="<?php echo 'productimages/'.$data3['stock'], '.jpg'; ?>">
<?php } ?></div>
</marquee></div>

<div class="clear" style="height: 1px;"></div>

</div>



<div id="newborder">
<div id="intcategories2">



<div id="subcats" style="height: 40px;"><form method="get" action="search.php">
<input type="text" style="height: 26px; width: 139px; padding-bottom: 0px; padding-top: 0px; margin-bottom: 5px; margin-top: 5px;" class="box" value="" name="search">
<input type="submit" value="Search" class="button">


</form></div>

<div class="clear" style="height: 1px;"></div>

</div>


<div class="clear" style="height: 1px;"></div>

Is your code in different pages? It looks a mess...

I didn't really investigate but from what I can see from the above code, you can't have a session_start() in the middle of a page.

From php.net: To use cookie-based sessions, session_start() must be called before outputing anything to the browser.