Add to cart button visibility?

[Fairyglass]

Hi all,
I'm working on a new site, where products will be available to buy only by authorised retailers who will log in. As I have it set up currently, the site requires a log in to access the shop, and no prices are displayed to the general public- however the "add to cart" button is still visible and clickable. If an unregistered customer clicks the button they're presented with the log on screen, but it would be better if they didn't see it in the first place!
The site's viewable at enchantedfairies.co.uk
I'm sure it's something simple- can anyone help?
Thanks,
Ben

[Duncan Rounding]

The 'Add to Cart Button Image' layout already has the block to do this - not sure why it's not working for you unless you perhaps modified it.

This is the conditional block:
<actinic:block if="%3cactinic%3avariable%20name%3d%22ProductPriceIsEnabled%22%20%2f%3e%20%3d%3d%20FALSE" >

Have a look in your layout and check it's there.

[Fairyglass]

thanks- like an idiot I'd not unchecked the "enable" box in retail pricing on any product- your reply gave me the clue I needed, and all is well now!
All the best,
Ben