Cemu doesn't use my Shadercache and makes a new one.

So I've watched few tutorials how to make use of shader caches and downloaded a cache pack.
Now i renamed the mario kart 8 shader file to what cemu names its own mario kart 8 shaderfile and replaced it in both folders (precompliled) (Transferrable)
But everytime I startup the game no compiling happens and the file's are being resettet to 0 bytes.
What's the problem