I'm loosing money with AK

[CruS]

Villain is 24/13/3.6 with no other reads

Full Tilt No-Limit Hold'em, $0.25 BB (6 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

Button ($24.05)
SB ($30.50)
BB ($6.90)
UTG ($43)
MP ($9.30)
Hero ($24.90)

Preflop: Hero is CO with K[img]/images/graemlins/club.gif[/img], A[img]/images/graemlins/spade.gif[/img].
<font color="#666666">2 folds</font>, <font color="#CC3333">Hero raises to $0.85</font>, <font color="#666666">1 fold</font>, SB calls $0.75, BB calls $0.60.

Flop: ($2.55) 6[img]/images/graemlins/diamond.gif[/img], K[img]/images/graemlins/heart.gif[/img], 9[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(3 players)</font>
<font color="#CC3333">SB bets $2</font>, BB folds, <font color="#CC3333">Hero raises to $8</font>, <font color="#CC3333">SB raises to $28.55</font>


Villain is fishy, 45/8/8.1
He likes any TP and has been showing down a lot of marginal hands.


Full Tilt No-Limit Hold'em, $0.25 BB (6 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

CO ($22.35)
Button ($68.75)
Hero ($28.30)
BB ($48.55)
UTG ($49.60)
MP ($25.70)

Preflop: Hero is SB with K[img]/images/graemlins/diamond.gif[/img], A[img]/images/graemlins/club.gif[/img].
<font color="#666666">2 folds</font>, CO calls $0.25, <font color="#666666">1 fold</font>, <font color="#CC3333">Hero raises to $1.1</font>, BB calls $0.75, CO folds.

Flop: ($2.35) K[img]/images/graemlins/heart.gif[/img], 8[img]/images/graemlins/spade.gif[/img], 7[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets $1.75</font>, <font color="#CC3333">BB raises to $4.5</font>, Hero calls $2.75.

Turn: ($11.35) J[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#CC3333">BB bets $7</font>

What's my play in both hands?
Mistakes on other streets?