Thank you, Zorro, for the answer. I installed the mod and had a party at Avadon, before completing the "Traped Lair" task. So I loaded that game and sent them to the Kva pylon. There I had the main character touch the pylon and... nothing happened. I mean not even the usual question if I want to go to Avadon or stay.
Hope that helps. I am curious to se the bovine part of your mod, but can't play without the functioning pylons. I restored, then, the backup scripts and now the pylon works, but no mod.
Thank you, again.