sims 2 Alien Abduction

I have the sims 2 Legacy collection but the Alien Abduction isn't working I tried doing it the normal way, summon Aliens doesn't work and even using cheats didn't work and I couldn't get mods to work either every time it looks it's going to work but then nothing happens is there a way to fix this I really want more Alien sims in my neighborhood i have one but that's only because he's the son of stella who was already a sim in the collage bin please and thank you