Error with session data

I have a web app that shows some menu items according of the user logged in. From a few days to today, when i log in with an user , the menu is shown with data or another user. I try again with different user and still the wrong data is shown
Tried deleteing cache and cookies and again for some reason i can see de tata of current user and later when log in with other user de data of the past user is shown again. In local machine with WAMP it works perfect. 


Thank for your help

When you are finished writing out your session data you should do a:

PHP Code:

session_write_close(); 


What did you Try? What did you Get? What did you Expect?

Joined CodeIgniter Community 2009.  ( Skype: insitfx )