Why am I losing with AK?

[Pokerho]

It's possible.

I don't have it in front of me, but it seems like my average hand is :

I raise 4 BB, get 2-3 callers, and I miss. Someone bets in front of me and I fold, or I bluff with 2 overcards and get 2 callers, THEN I fold to a bet later.

I suppose it could just be a sample size issue. It wouldn't take too many big losses to make it negative. I just wanted to make sure I was playing it more or less correctly.

Can anyone spot a leak based on my description?