Setup a distributor login account

I want to create a login area for retailers/distributors so that they get to see prices, stock levels, wish list etc. Public does not see this at all.
I've tried to put a Register link at top of menu. And it says registration not allowed. I don't know where to adjust this.

Cheers.. see www.kidsbalancebikes.com.au

Hika Shop business.. 1.5.7
Joomla 2.5.2

The message "registration not allowed" means that you turn off the registration of users in joomla.
Please follow that tutorial to activate it:
www.cmsmind.com/joomla-2-5-how-to-allow-...ion-on-your-website/