I haven't logged in for over 2 years. Your doing something wrong. In the late Spring to fall I am seldom on iboats so time isn't an issue. Perhaps when you go to log in . That little box that pops up that says "Remember me". Put a checkmark in the little white box. Hope this helps.
What Bob says, plus are you using AOL? I have to and get this problem at times on a couple of forums. If you are using AOL try closing it and using some other browser like IE for example....just a thought