If kavadude didn't show up in the chat, then he has his chat settings to not show him online. The only thing you could do in that situation is contact him via conversation through the forum.
Also for the life of me I can't get that damn testuser2 off the chat. It was the user that cometchat used to repair the installation to be able to use mobile. Someone out there is chatting on kavaforums and has no idea.