Rigged Characters - Can't edit/ animate deformation curves

I’ve been sent a scene to animate two rigged characters that possess deformation curves, but whenever I go to try and animate or ever move the curves, nothing happens since I can’t seem to be able to edit them. The curves are visible, all the layers are unlocked, the animation mode is on, and I’m using the transform tool. Could there be some other type of lock or something that is preventing me from animating these character’s curves? I can’t seem to find a solution for this.
I really need some help.

Hi there

Have you applied the deformers directly to the drawing layer that they need to manipulate? If so, is there any chance you could perhaps show us a screenshot of the scene and what the deformers look like when you’re trying to animate?