AKs mid position

[metsfan88]

PokerStars No-Limit Hold'em, $0.05 BB (9 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

UTG+1 ($12.21)
Hero ($5.10)
MP2 ($9.57)
MP3 ($1.33)
CO ($1.93)
Button ($10.15)
SB ($9.20)
BB ($11.54)
UTG ($9.92)

Preflop: Hero is MP1 with K[img]/images/graemlins/diamond.gif[/img], A[img]/images/graemlins/diamond.gif[/img].
<font color="#666666">2 folds</font>, <font color="#CC3333">Hero raises to $0.2</font>, <font color="#666666">2 folds</font>, <font color="#CC3333">CO raises to $0.45</font>, <font color="#666666">3 folds</font>, Hero calls $0.25.

Flop: ($0.97) 4[img]/images/graemlins/heart.gif[/img], 6[img]/images/graemlins/club.gif[/img], 3[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
Hero??

I have a hard time with these spots when I have a good starting hand but flop nothing. Do you bet out here or just check?