hello and welcome
every time you made a post a little box would have popped up to tell you it would first have to be moderated before appearing on the forum
that is the default for all new member posts and is the way we keep the community safe from spammers etc
there is more information about it here in our guidelines
http://neurotalk.psychcentral.com/showthread.php?t=1293
and in the sticky thread on New Members forum
http://neurotalk.psychcentral.com/thread18185.html