Welcome to the forum, Stephan.

This notice is what you would have seen in the rules during the registration:

In an effort to reduce problems with new accounts and advertising, new accounts have restricted privileges. They cannot use the Private Message system or create new threads in the Marketplace or certain other forums. After being registered for four days (regardless of post count), these privileges will be raised to that of normal members (being able to send/receive PMs, etc.).

It is right there at the top in bold type:

http://www.talkfreelance.com/rules.php