If you read the forum rules it clearly says members between X and Z are classified as Registered Users and must either PAY or wait, where as members between A to C are classified as Regular Users and can do whatever they hell they want.

Judging by both of your forum registration dates and post counts I'd say you are both in the X to Z class.

Also, if you pay attention to the bottom of the rules post you'll notice a neat little thing that says when it was last edited which would give you a good idea of when the rules were changed, thus answering why you can no longer post there