The one thing that no proponent of the KCA has ever provided is the cause of the first event. Now you might reply - this was the First Causer (aka the Personal Creator or whatever name you want to use). But this refers to the causer not the cause. So you need to identify what the First Causer did first. The problem that you face is that the First Causer exists unchanging. And to do something requires change. But this is impossible for something that is unchanging. But then you can re-define some words to provide a way out of this, just as other proponents have done...