($27) ATs in BB to button raise, lost here

[taipan168]

Opp's stats were something like 27/0 at this point. Even a player like this is going to steal raise from the button, right? What's the best line here, shove back preflop? Or should I just let it go? As played, I have to shove when the A flops, right?

PokerStars No-Limit Hold'em Tourney, Big Blind is t50 (8 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

MP2 (t1020)
CO (t1245)
Button (t1500)
SB (t1315)
Hero (t1770)
UTG (t645)
UTG+1 (t3090)
MP1 (t2915)

Preflop: Hero is BB with A[img]/images/graemlins/spade.gif[/img], T[img]/images/graemlins/spade.gif[/img].
<font color="#666666">5 folds</font>, <font color="#CC3333">Button raises to t200</font>, <font color="#666666">1 fold</font>, Hero calls t150.

Flop: (t425) 4[img]/images/graemlins/heart.gif[/img], A[img]/images/graemlins/heart.gif[/img], 2[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#CC3333">Button bets t400</font>, <font color="#CC3333">Hero raises to t1570</font>