Session Timeout on MI

Hi,

I am trying to configure a session time out in MI using the <session-timeout> field on the web.xml. I am using the web.xml from the MI/conf folder. I set it for 1 min for testing (defualt is 30 min.). I rebooted the device and log on into the device. I wait for about 2 min in order to see if the session expired. But I don't see that that the device does not expired. I expect that after the session expired to see that the device ask me to login again. Do I need to configure something else to accomplish this. Any help will be appreciated. Thanks in advance.