Showing signin after signout when we click on back button

Question

hi,

i have a problem regarding signin/signout.What happens

i have a page called list view and on the top we are showing signin/signout.If user signin, then it is showing signout on to the top which is correct, but when we click signout it is going to login.aspx.When we click on to the browser's back button it again shows signout instead of signin as user is signout which is incorrect.

pls help me out.