As I see it, there might be three possiblities; 1) As Hendrich said, the timing is not right - the one you want to chat with goes offline the moment you come online. Pure coincidence. 2) There might be a technical problem - it may look like someone is online, when they actually are not. This happens sometimes. 3) Maybe they don't want to talk with you? - it's harsh, I know, but some people act that way when they don't want to be in contact.

maybe its just the timing is not right...lol