running animation not working at all?

So i wanted to add a custom running animation, i had already finished the animation and according to lots of youtube tutorials on it you had to go in play mode, copy the animate script in your character then paste it in startercharacterscripts and edit some animation id's to the id of the animation i want, but for some reason the method didn't seem to work whats happening?

I also edited the animation tracks that were in the "run" and "walk" value, still nothing happened, i've had this problem for months now and its getting a bit annoying because animation is a big factor of the game im working on, any help is appreciated thank you for reading!