I'm having the same problem as Obi Wan Pere, but I'm also not having any effects show up at all. When i look at the crystal itself it doesn't show any added effects. I have no mods that could conflict with it.
For some reason i can't get the pink lightsaber to work. The crystal shows up, but when i go to install it no preview of the lightsaber shows and when equipped it just stays the same color as it was before. Aside from the pink everything works as it should and it's a great mod. I only have this and your Lightsaber Visual Effects for K1 installed when it comes to lightsaber mods.