How do I keep yahoo permanently logged in?

Why does a message keep popping up on my yahoo mail saying I have been logged out because....?

• I have logged on to another computer? I am hoping that someone is not logging into my account from another computer. I have been suspicious that my ex may have put a key logger on my computer to get my passwords, because odd things continuosly happen to my computer. Has any one else had this happen to them when they were already logged into their own yahoo mail? Then a sign pops up saying you have been logged out, because you have signed into another computer?

• Answer:

  If you are using the new mail it has the messenger, so it you are signed into the messenger, you need to sign out of one or the other. Maybe you are signed into the cell phn or your Ipod. You can only be signed into one at a time.