stoneyrosetreered
It might be that you have failed the real first stage, which is a paper sift of applicants.
Not everyone gets past the initial application.
It is still worth trying to find out from HR where you fell short; though don't hold your breath - some of the recruitment side of HR are not the most switched on, so you may not get a decent response, (bear in mind (and to be fair to the more competent amongst them), that as well as some general ineptitude, HR do have a high volume of applicatons to wade through to give you feedback)