Well, Ken, welcome to the club!

Maybe, now, we can begin to solve the mystery of the intermittent, sporadic loss of login state (or, sometimes, inability to login at all).
Most annoying, of course, is to lose logged-in state after drafting a reply to someone who needs help but just prior to posting it. After this happens I usually can't login for a while - then magically, I can, and all is well for days or weeks - but then the malaise returns.
I have urged our administrators many times to investigate to try to locate the problem and also tried to get some action from Ulead tech support but the problem continues...
BTW, I am now trying other browsers, to see if this can possibly alleviate the problem (I had been using IE).