If is posibble you need to open a ticket on file issue to ask that.
Your logo can be improoved, there is a large gap on your header too.
I think typography & layout need improovements. PSD category is the most difficult to get, if you fix your design maybe they may say that it is not unique enough.
I found it very nice. Not know why is rejected.
I see it now, its very nice but i agree with cecaria, dificult to read.