Messenger shows all of my contacts are offline when I know they aren't. They can send me ims, but when I reply, I receive a message saying they're offline & my message can't be delivered. I don't know why it keeps happening. Especially, given the fact that they're online. I haven't used Messenger in YEARS so I don't know my way around it anymore. I don't know if it's something to with my end or if it's something on theirs.