A troublesome AKs hand

[tripdad]

My opponent in this hand is somewhat loose and quite passive preflop, and postflop.

I'm pretty sure my flop bet here will have a long term positive expectation, but i want to know what you guys think about the hand. i'd like to get better with playing my big draws, and there is no place better to ask than here.

Party Poker Pot-Limit Hold'em, $ BB (9 handed) converter

UTG+1 ($97.8)
MP1 ($183.95)
Hero ($221.4)
MP3 ($437.05)
CO ($92.4)
Button ($200)
SB ($188.08)
BB ($58.4)
UTG ($171.23)

Preflop: Hero is MP2 with K[img]/images/graemlins/spade.gif[/img], A[img]/images/graemlins/spade.gif[/img]. CO posts a blind of $2. SB posts a blind of $1.
<font color="#666666">1 fold</font>, UTG+1 calls $2, MP1 calls $2, <font color="#CC3333">Hero raises to $13</font>, <font color="#666666">1 fold</font>, CO (poster) calls $11, <font color="#666666">3 folds</font>, UTG+1 calls $11, MP1 calls $11.

Flop: ($55) 6[img]/images/graemlins/spade.gif[/img], J[img]/images/graemlins/spade.gif[/img], 7[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(4 players)</font>
UTG+1 checks, MP1 checks, <font color="#CC3333">Hero bets $52.25</font>, CO calls $52.25, UTG+1 folds, MP1 folds.

Turn: ($159.50) 2[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, CO calls $27.15 (All-In), Hero calls $27.15.

River: ($213.80) 8[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players, 1 all-in)</font>

Final Pot: $213.80