AJo from EP in loose game

[craigruby]

NYC club $1/$2, I have AJo and have about $350 in front of me, and I make it $12 to go. The button (pretty straightforward player) makes it $25 to go.

Besides the obvious 2 things I have already done wrong I'd like to see about the postflop play.

I call the raise and we are HU.

Flop is A [img]/images/graemlins/diamond.gif[/img]9 [img]/images/graemlins/spade.gif[/img]4 [img]/images/graemlins/club.gif[/img]

I check/call $30 and that ace did not make him look to happy when the flop came. Right here I think that I want to keep this pot small.

Turn is a 2

[img]/images/graemlins/heart.gif[/img], and I check/call $40, at this point I don't think he has AK or AQ as I think he seemed more disappointed as the hand continued, so maybe KK or QQ.

River is a blank and I check and he checks behind and shows KK.

How should I have played this post-flop?

River