(109) Mid-game play, QQ gets c/r'ed on a K-high flop

[Slim Pickens]

Full Tilt Poker $100+9 No-Limit Hold'em Tourney
Big Blind is t100 (8 handed)

UTG (t1350)
UTG+1 (t2450)
MP1 (t1295)
MP2 (t2560)
Hero (t1650)
Button (t1520)
SB (t1400)
BB (t1275)

Preflop: Hero is BB with Q[img]/images/graemlins/heart.gif[/img] Q[img]/images/graemlins/spade.gif[/img]
<font color="#666666">4 folds</font>, <font color="red">Hero raises to t300</font>, <font color="#666666">Button folds</font>, SB calls t250, <font color="#666666">BB folds</font>.

Flop: <font color="blue">(t700)</font> K[img]/images/graemlins/diamond.gif[/img] 6[img]/images/graemlins/club.gif[/img] 2[img]/images/graemlins/heart.gif[/img]
SB checks, <font color="red">Hero bets t300</font>, <font color="red">SB raises to t800</font>, <font color="#666666">Hero folds</font>.

I have no specific reads on SB other than he isn't completely terrible. His play has seemed slightly loose-passive, maybe 25/5 up to this point. Where did this go wrong?