Session or browser problem???

Hi all,

I have a news website tat is developed on joomla 1.5.Login facility is
done thru a login component.On each page,ther s a 'Log In' link that
redirects them to a login page.On successful login,user details are
set in session as well as cookies and then redirected back to d
referring page.The 'Log In' section changes to 'Welcome user',along
wid a 'Log Out' link.All this works d same in IE 6 as well as in FF
2.The difference comes durin log out action.

In FF,on clickin 'Log Out',the required session vars are set '' as
well as cookies in d component and then redirected back to referring
page.The login bar changes back to 'Log in'.But in IE,once redirected
from the component,the page still shows the login bar as 'Welcome
user'.Only if i manually click the refresh button (of IE), the page
gets refreshed and the login bar shows logged out status.

Any help wud be highly appreciated...