Cachingo

I played Dragon Fall years ago and now I intalled it again to play. I realize that the game accepts the number codes. But whenever I have to input an alphabetical code, it fails. Im in False Flag mission and to progress in the game I need to enter the "Pride" code, but the game doesnt accept it. The same with every alphabetical or non-numerical codes. Have not find anyone in the web talking about this issue. Maybe is just a problem with my version of game?