3-betting KQ always gets me in trouble

[dave44]

MP is 29/23/1.5 after 80 hands.

Party Poker 10/20 Hold'em (5 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

Preflop: Hero is BB with K[img]/images/graemlins/spade.gif[/img], Q[img]/images/graemlins/club.gif[/img].
<font color="#666666">1 fold</font>, <font color="#CC3333">MP raises</font>, <font color="#666666">2 folds</font>, <font color="#CC3333">Hero 3-bets</font>, MP calls.

Flop: (6.50 SB) 5[img]/images/graemlins/spade.gif[/img], T[img]/images/graemlins/spade.gif[/img], A[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets</font>, MP calls.

Turn: (4.25 BB) K[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, MP checks.

River: (4.25 BB) 9[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets</font>, <font color="#CC3333">MP raises</font>, Hero folds.

Final Pot: 7.25 BB

How's the turn check? I figured the river bet will get enough value from kings and tens to be worthwhile. Thoughts?