A good question to ask yourself is what have you done in the past year between your two applications. I think a lot of schools keep your applications for several years, and if you don't change much and you didn't get an acceptance in a previous and nothing has changed on your application then the school really would have no reason for giving you an acceptance. Sorry that was long winded, but the basic premise is what have you changed, have you fixed any deficiencies that you had last year. PM me if you need any advice. I got in this year after trying last year, I can let you know what I think worked for me (if anyone can have any clue about any of this random process).