Hey, my slingbox pro hd does the same thing. And it's annoying!
I have to re enter my password and kick off other users when I only have it on one lap top. Doesn't make sense
Also yesterday while i was watching it lost connection and now it won't connect to my network anymore.
I reset it and the network light just blinks for up to a minute then shuts stops and both the power light and network light go off..
I dont know what to do.
just got a slingbox HD to replace my old Pro (which stopped working when DTV upgraded their channel guide to HD).
So yesterday, I kept getting this log in problem.
Also, sometimes, it does not get the video stream - it has a 'no video' message in the bottom right.
From what I can tell - this is going to be a serious downgrade from having my pro the last five years. I might need to roll back.