Is it easier to be a foreign exchange student to korea for auditioning for JYP, SM and YG?

I have email auditioned for 6 times, 3 times for JYP, and 3 times for SM. I would think that if i actually go there in person, it will be easier. But is it?? Do i suck actually?? does it really matter if i audition anyway?? Please answer!! and here is a link to my covers. Http://www.youtube.com/user/PeridotGreenPearl