Bad Play or Bad Luck?

[John in Michigan]

Maybe an hour into a freeroll. Blinds are 50/100.

UTG raises to 350. Next player folds, next one calls. All others fold to me (one off button). I call with K [img]/images/graemlins/heart.gif[/img] J [img]/images/graemlins/diamond.gif[/img]. BB also calls.

Flop is J [img]/images/graemlins/heart.gif[/img] K [img]/images/graemlins/spade.gif[/img] 3 :Club:. Initial raiser bets 400. I call. Other 2 players fold.

Turn is 4 [img]/images/graemlins/spade.gif[/img]. Villian bets 500. I raise to 1,000. He puts me all-in. I call.

He shows AA. I have two pair - K and J.

River is a 4 [img]/images/graemlins/diamond.gif[/img]. I lose - AA and 44 beats my KK and JJ.

I figured all along he had a good hand, most likely a pocket pair but really doubted he had two pair beat...and I was right until the river. Hence the title of my post..bad play by me or just bad luck?

My gut reaction is bad luck, although as I think about it...any pair (other than king or jacks) on the board made him a winner. But can you play hands based on a fear of the board pairing?

Thanks for any thoughts.