ATs on bubble

[HoldingFolding]

Opponent had been stealing a lot, but the hands I'd seen had been solid. I thought I might still have some FE, so went all in. Should I have laid it down?

Party Poker No-Limit Hold'em Tourney, Big Blind is t300 (4 handed) converter

Button (t2090)
Hero (t1920)
BB (t1130)
UTG (t2860)

Preflop: Hero is SB with T[img]/images/graemlins/club.gif[/img], A[img]/images/graemlins/club.gif[/img]. Hero posts a blind of t300.
<font color="#666666">2 folds</font>, <font color="#CC3333">Button raises to t600</font>, <font color="#CC3333">Hero (poster) raises to t1920 (All-In)</font>, Button calls t1320.

Flop: (t3840) 6[img]/images/graemlins/heart.gif[/img], 3[img]/images/graemlins/spade.gif[/img], 4[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players, 1 all-in)</font>

Turn: (t3840) K[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players, 1 all-in)</font>

River: (t3840) 5[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players, 1 all-in)</font>

Final Pot: t3840