session data has not been accessing

[.Ram]

I am trying to fill the deleted massage in session variable in product_edit method under product controller like this:-\[code\]$_SESSION['msg']="Record has been deleted successfully."\[/code\]And then i am redirecting to the list page like this:- \[code\]redirect('allinone/product_list');\[/code\]and then i am showing the massage on the list page in view like this :- \[code\]<?php if(isset($_SESSION['msg'])){?><tr> <td colspan='8' align="center" class="error_td"> <?php echo $_SESSION['msg']; unset($_SESSION['msg']);?> </td></tr><?php } ?>\[/code\]But the session massage is not echoed on the list page. I can't figure out what i have missed in my code ?Could anyone look into this ?I think the new session has created on every navigation.I am new in codeignitor framework.Any help would be greatly appreciated. Thanks a lot.