AKo - please critique hand play

[PokerFox]

Party Poker
No Limit 6-Max
Blinds: $0.10/$0.25
4 players
Converter

Stack sizes:
Hero: $42.80
Button: $36.03
SB: $14.11
BB: $25

Pre-flop: (4 players) Hero is UTG with A[img]/images/graemlins/spade.gif[/img] K[img]/images/graemlins/heart.gif[/img]
<font color="cc3333">Hero raises to $0.75</font>, Button calls $0.75, SB calls $0.65, BB calls $0.5.

Flop: A[img]/images/graemlins/heart.gif[/img] 6[img]/images/graemlins/spade.gif[/img] 4[img]/images/graemlins/club.gif[/img] ($3, 4 players)
SB checks, BB checks, <font color="cc3333">Hero bets $2.6</font>, Button calls $2.6, 2 folds.

Turn: 9[img]/images/graemlins/diamond.gif[/img] ($8.2, 2 players)
<font color="cc3333">Hero bets $7</font>, Button calls $7.

River: 3[img]/images/graemlins/heart.gif[/img] ($22.2, 2 players)
<font color="cc3333">Hero bets $21</font>, Button calls $21.

Results:
Final pot: $64.2
<font color="ffffff">Hero shows As Kh </font>
<font color="ffffff">Button shows Ad 9s </font>