We have currently some restriction for new members. You need to be registered for 5 days and need to have 5 posts before there are no restricitons.
You should be able to post freely, although posts with web addresses might need moderator approval. Otherwise I don't see what the problem could be, and we'd need more details please.
Well, if you have something interesting to show, I would anyways recommend to do it in a forum thread ;) , because the profile posts will get very, very, very little attention.
Comments on Profile Post by Adamiy