[Zope] Zope Logout Problem

[Praveen Kumar]

Dear All,
       I have been facing problem with Logout. When I click Logout it is
not actually logging out.

I'm calling the following code in the Login Script:
*********LOGIN SCRIPT***************************
<dtml-call "RESPONSE.setCookie('Login_Name',
_.SecurityGetUser().getUserName(), expires='0')">
<dtml-comment>
  <dtml-call "RESPONSE.setCookie('user_name',
_.SecurityGetUser().getUserName(), expires='')">
</dtml-comment>
<dtml-if "REQUEST.has_key('Login_Name')">
<dtml-in DateLookup>
<dtml-if Reminder_Lookup_By_Login>
<form><input style="font-size:15;font-weight:bold" type="button"
value="Check Reminders" onClick="JavaScript:PopWindow738401()"></form>
</dtml-if>
</dtml-in>
</dtml-if>

In the Logout Page:

********************LOGOUT SCRIPT*********************************
<dtml-var la_header>

<!-- <dtml-comment> -->
<p>REQUEST:<br>
<dtml-var REQUEST>
<br>
<p>RESPONSE:<br>
<dtml-var RESPONSE>
<br>
<!-- </dtml-comment> -->
<dtml-call "RESPONSE.expireCookie('__ac')">
<dtml-call "RESPONSE.expireCookie('session')">
<dtml-call "RESPONSE.expireCookie('*')">

<dtml-call "RESPONSE.expireCookie('Login_Name')">
<dtml-call "RESPONSE.expireCookie('user_name')">

<!-- <dtml-call "RESPONSE.redirect('/demo/acl_users/LoggedOut')"> -->

<!-- <dtml-comment> -->
<p>REQUEST:<br>
<dtml-var REQUEST>
<br>
<p>RESPONSE:<br>
<dtml-var RESPONSE>
<br>
<!-- </dtml-comment> -->

</body>
</html>

Please suggest me how to solve this problem.
-- 
Regards
Praveen Kumar,
SoftPro Systems Ltd,
Ph: 91-40-23111806