As a security measure to combat spam, at time of writing there is a 15 post minimum limit before you can start posting links.
If you need to post a link before you reach 15 posts, please just remove the http and www text from your links so it becomes plain text. A forum moderator will then format the link for you.
Since this is a measure to stop spam, please do not post pointless items to the forums in order to get to the 15 post limit, as these posts will be removed.