Dropped Session! Please HELP!

[earthlingzed]

I have an ecommerce site that is dropping the Session var that stores the cart info and I cannot for the life of me diagnose why. I am creating a unique session id when the user comes to the shopping cart page for the first time, and feeding it to a class which store it along with the items in a databse. Here is how I create the cart id:

session_start();
if(!isset($_SESSION['cart_id'])) { 
     $cart_id = md5(uniqid(rand())); 
     $_SESSION["cart_id"] = $cart_id;
 } else {
 		$cart_id = $_SESSION["cart_id"]; 
 }

require_once("../classes/shoppingcart.php");
$cart = new cart($cart_id);

I thought the session was just timing out so I used a .htacces file to force the session to last longer. It still drops teh session variable and the user loses all of their selections.

I also tried using cookies instead, I am getting the same problem.

PLEASE HELP!

[rehfeld]

is it just the shopping cart that is not working, or are sessions not working?

i see possible problems w/ your code, but w/out knowing how you cart class works i cant be sure.

but first, find out if your not carrying the session from page to page. just because the cart isnt working, doesnt means sessions arent.