Help: Gagay overdrive

[Verzen]

So I am having trouble with gagay overdrives script for BEM. I am trying to refresh the skill window 'after' I learn a new skill that will grant me a new overdrive by using @window_skill.refresh.. Yet it gives me a no method error. Anyone know how to update the window so I dont have to log out of the skill window then log back in to access the available overdrives? Thanks.. Here is the script with the error..