Products copied as duplicates in Discount Settings

[warmrooms]

Hi

I have set some products to have a discount against them so that when the customer goes through to the shopping cart it takes off the set percentage.

I have products copied as duplicates and although it is showing against the initial product e.g. http://www.warmrooms.co.uk/acatalog/...Radiators.html, it is not showing in the product copied as duplicate, e.g. http://www.warmrooms.co.uk/acatalog/...Radiators.html

Any ideas how I can set it against both? I have definitely copied all of (in this case) the 'volcano' product in the discount settings.

Any help would be greatly appreciated.

Thanks, Brian.