Hello Baldfriend,
scripted invasions not appearing should generally be a problem from the surface of the map. E.g., if the relative strength of the defenders is too big, the invaders reveal common sense and run away instantly.
The cheering of your own troops has just signifies the end of the sequence: the enemy has gone and they have survived this time round.
If no-one else offers you any help here, you can send your map to me (the e-mail is in my profile).
Of Honour without Fame,
Of Greatness without Splendour,
Of Dignity without Pay - Walter Benjamin[This message has been edited by peter2008 (edited 10-16-2015 @ 02:25 AM).]