Function 'reduction amount' isn't working

[Jovaku]

Hi,

function 'reduction amount' stopped work correctly in my eshop yesterday (it worked fine before and I didn't do any changes in system or settings yesterday). Now if I write normal price and reduction amount, lowered price will show correctly in admin, but in front-office lowered price will be the same like normal price. How can I fix it?

I found similar problem in http://www.prestashop.com/forums/viewthread/78497/general_discussion/reduction_amount_issue but it's not solved there.

I use v. 1.2.5.0.

I am sorry for bad english.

Thanks a lot.