I have a question, when I compiled my asp.net c# web application and transfer the ".dll" file to my hosting server which is godaddy. What happened was, all my users that used to show "online" all appears offline at once. I query db to get that online status of a column called "LastActivity"

I guess, when that happens, I would like to sign out everyone so that they can relogin? How can I do that? I'm using form authentication.