problem with flash buttons

Hi

I have downloaded two flash templates(3, 4 in the order). I have customize the pages. If one page wants scroll down the flash buttons freezed.The roll over efe doesn't play. You have to click two times on the button to open new page. This problem is only with firefox. I have 3.5 version. With IE everything is fine.
go to http://www.danisoft.gr/alextest/ at "PRODUCTS" page and scroll down, then scroll up and try to click buttons

thanks in advance