Being retired

I visit 10 different forums each day (car related) and the only problem I have is with this site. Almost everytime I come I have to log in again even though I check the "remember me" box. Then even when I'm logged on, I go thru a few threads and find myself logged out again. Is there something I should be looking at to keep myself logged on? If my computer setting were not right, the other forums would act the same way..and they don't. I stay logged on for months.