OTB versus Big Blind's Check-Raise

[RemyXO]

Ramping up my HU play and stealing the blinds. Here's a typical situation. Read on the villain is that he's decent aggressive player. Is it standard to calldown or let go of the middle pair on this heavily coordinated board?

Full Tilt Poker $1/$2 Limit Hold'em - 8 players
Hand Converter Tool from DeucesCracked.com

Preflop: Hero is Button with Q[img]/images/graemlins/club.gif[/img], K[img]/images/graemlins/club.gif[/img]
UTG folds, UTG+1 folds, MP1 folds, MP2 folds, CO folds, <font color="#FF0000">Hero raises</font>, SB folds, BB calls.

Flop: (4.50 SB) T[img]/images/graemlins/spade.gif[/img], K[img]/images/graemlins/spade.gif[/img], 9[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
BB checks, <font color="#FF0000">Hero bets</font>, BB calls.

Turn: (3.25 BB) A[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
BB checks, <font color="#FF0000">Hero bets</font>, <font color="#FF0000">BB raises</font> Hero ??