Some ragdolls won't appear in my spawn menu

I’ve downloaded and added a couple of sets of ragdolls to Gmod: specifically, mr DEATH’s Megaman ragdoll and Gltichy’s Dr. Eggman. I’ve managed to get other ragdolls to appear and work, so what am I doing wrong with these?

where did you install it.

I installed the folders with the models, materials, etc. in the addons addons, and copied the folders for models, materials, etc. into the garrysmod directory.

reinstall gmod?