add to cart becomes notify in categories

I am using the template in italian language and I have activated the latest products module and it works fine but when i click on categories instead of showing "aggiunge" (add to cart) it shows "Avvisami" (notify me) on products. I don't know from where comes the problem. Can u help me out... thanks in advance. see the difference in attached screen shots.

Hi,
When a product out of stock, in will show "Notify me when product in stock" instead of "Buy now".

Please read the VM document/ user manual for detail.

Thanks for using our products!

Hi, thanks for the quick responce. the products is disponible in the storeroom. the problem is the difference of the button on same products changes while i shift from category to latest products modules. when i click on the latest products i can see the button add to cart near the product. but when i go to the same products through the categories modules i see the button "notify me".
thanks

Hi,
what the version you using now? Joomla 1.5 or Joomla 1.7?
If you are using version 1.5, please download the attachment then extract to your root dir of your site (over-write).

Thanks guy. i did the changes and it works.
good day.