You have a fair number of good pieces here, but no means of removing enemy creatures. Where is Feast of Blood? Why don't you include Urge to Feed? Essentially what you're going on is straight aggro with no removal, which, I fear will bite you in the end. Pillar of Flame, Shock or just some simple direct damage could help a ton (especially with one or two Curse of Bloodletting).
Here's a quick search I did that should show some of the options:
http://deckbox.org/games/mtg/cards?f=27
!b31!734.3
I'd also suggest knocking your mana curve down some. You don't need so many cards in the 5-6 range as you might want in the 1-2 range.
Lastly, if you only have one of a card, unless it's going to make a BIG difference, I'd leave it out. It leads to too much inconsistency.
So if you give it quick tune up I'd wager you will have significantly more success.
Good luck!