Your account is no longer activated so you can't see the board--it is only available to activated accounts.. Did you change your email address here on the boards and not confirm the change? Take a look at the Not Fully Registered thread stickied at the top of this page and follow the instructions in the first post.
ETA: When your account is activated again you need to be sure to read the rules at the top of the Rent Trade Board. The rules for posting have changed since you were here last.