Constant Log-Outs Keep Bothering Me

Lately I’ve been dealing with a glitch… Once I log in and navigate around the forum, I keep encountering “You must be logged in…” pop-ups… Occasionally, even after logging in, pressing the back button in IE forces me to sign in again… Plus, more often than not, if I attempt to submit a post, it logs me out and loses all my text… I didn’t have this issue before switching to satellite internet… Where is that login status information kept??? Could the delay from the satellite connection be causing these log-outs, or is there an issue with my computer system???