[imp] refresh browser buttom

[alois blasbichler]

hello list
i have a question : 
if i am logged in to //server/horde  and i klick the refresh buttom of my 
browser i am on the login screen - my horde session expires
when i am logged in to //server/horde/imp and i klick the refresh buttom of my 
browser nothing happends, and my horde session not expires

i refer to not logout when i refresh my browser
is this possible ? 
how can i do that ?
i am using horde 2.1 and imp 3.1

thank you luis