Offline messages aren’t sent.
Every single time I try to send a message to someone who is offline, it’s not sent. =(
This isn’t a bug, it’s completely intended, I believe.
When WLM 2009 comes around, this won’t be a problem hopefully. (but dont expect it to come too soon)
so does it happen to you too?
It happens to everybody. 
glad to know that XD
i thought it was a bug with my PC LOL