Transparency Module not working

Hi, I’m using Toon Boom Animate Pro v2 and I’ve having an issue with the transparency module.

I cannot seem to animate the module. Whenever I add a keyframe the transparency slider becomes grey and uneditable.

Here’s a screenshot of what I mean: click here

Thank you so much for your help in advance,

Click on the little black triangle after the “S” shaped icon to create a fuction for your transparency values. You can create keyframes and edit values from the function graph.