There is a box in front of the words "Remember Me" that if you click in box it will put check mark and it shouldn't log you out. This is located where you login.
Also, generally, there is function while you are typing in the message box, near the bottom, that states "Auto Saved." It will usually remember what I have typed, even if the program logs me out. When I hit reply, it will tell me I am not longer logged in. It will also give me any opportunity to type in my user name and password and log in again. Sometimes it will go ahead and post my message. Sometimes it will take me back to the screen where I was typing, but it is all gone. However, it will usually say something like "Restore Saved Content" in the lower left of the message box. In the past there have been times where some of it is missing or I thought I had changed. At least, not all is lost.
Janey - Neat people never make the exciting discoveries I do.