Quickly.

Perhaps, due to the fact that it's not the right version of Heroes (in version 3.1, the map was obviously not tested), there may still be issues with the system. On XP SP2 and higher (with video settings in the game usually set to High or Very High), I played through the map to the end, and repeatedly.

Here is a page with feedback from other players who successfully completed this map, and some hints (in English): Feedback