So you build the level, saved it as yourname.wmp (any name except default!) added a main script and build the map?
Now how do you run the map?
1. after assigning an action to a model, use the "update entity" methode for rebuilding the level.
2. use the "RUN" button to run the level with scripts. If you use the "level fly-through" in the build-options window, no scripts will be exectuted!