My b2evolution Version: Not Entered

Most times I sign in successfully the first time, but frequently I have been signing in, and being redirected to my blog without actually getting signed in. After I sign in again and i successfully login, almost every link I click between pages causes me to get kicked off and having to sign in again. Its annoying because everytime I try to edit and save a post im forced to log back in, thus erasing my edits. i havent changed anything on my browser, but i did first start to notice the problem while on a different computer. However i have the "remained signed on at multiple locations" box checked.

Any ideas?