$16 tight btn limps to open late game

[vers]

Hey. Villain is 12/4 over 25 hands filtered. I really feel that he's limping strong here and trapping. Not sure how to proceed. Calling flop to try to freeze him I figure is good.

PokerStars Tournament, Big Blind is t200 (6 handed) Converter on pregopoker.com

UTG (t1100)
UTG+1 (t1430)
CO (t4530)
Button (t3255)
Hero (t1560)
BB (t1625)

Preflop: Hero is in SB with A[img]/images/graemlins/spade.gif[/img] T[img]/images/graemlins/spade.gif[/img]
<font color="gray">UTG folds</font>, <font color="gray">UTG+1 folds</font>, <font color="gray">CO folds</font>, Button calls t200, Hero calls t100, BB checks

Flop: (t600) J[img]/images/graemlins/club.gif[/img] A[img]/images/graemlins/heart.gif[/img] 7[img]/images/graemlins/club.gif[/img] (3 players)
Hero checks, BB checks, <font color="red">Button bets t200</font>, Hero calls t200, <font color="gray">BB folds</font>

Turn: (t1000) K[img]/images/graemlins/diamond.gif[/img] (2 players)
Hero checks, <font color="red">Button bets t400</font>, <font color="gray">Hero folds</font>