Whenever i sighn out of mesenger it automaticly sighns me onto my phone. how do i take that off thank you plz?

help it is causing me text meseges

Whenever i sighn out of mesenger it automaticly sighns me onto my phone. how do i take that off thank you plz?
On your Yahoo Messenger, click Messenger \ Preferences \ General





The last option....'Signing out of Yahoo Messenger'...UNMARK both boxes...click 'APPLY/OK'





Doing this will not automatically log on to your mobile phone when you sign out from your Yahoo Messenger.