html - autocomplete = 'off' is not working on firefox

I am facing a browser issue:

I created 2 login pages of same domain.

1. www.example.com/login.cfm


2. www.example.com/newLogin.cfm

I put the form name different for 2 forms with in these two page. Also I put autocomplete = 'off' for the second form and for the text fields within that form.(But it is on for first form ).

Now if I save the username and password at the time of login from www.testDomain.com/login.cfm in browser, then the list of usernames are auto populating in the username field of second login page even if the auto Complete is off. I need to block this for security reasons. Is there any way to do this? I am using FireFox V21.