Патч на Heroes of Might & Magic 5 ОС Windows 7

The problem is that I installed the licensed version of Heroes of Might & Magic 5, and the game runs fine, but I can't install the patch. The game is from Buka, and there's no patch for Heroes of Might & Magic 5 on Buka's official website. I tried installing the patch from http://heroesworld.ru, but it says: "The game 'Heroes of Might & Magic 5' is not installed or is installed incorrectly. The update cannot be installed." Please help; I would be very grateful.