AA fold to a raise on flop?

[jallabar]

PokerStars No-Limit Hold'em, $0.10 BB (5 handed) pokerhand.org hand converter

Button ($14.35)
SB ($22.65)
BB ($10.60)
Hero ($9.70)
MP ($10)

Preflop: Hero is UTG with A[img]/images/graemlins/diamond.gif[/img], A[img]/images/graemlins/club.gif[/img]. MP posts a blind of $0.10.
<font color="#CC3333">Hero raises to $0.5</font>, <font color="#666666">2 folds</font>, SB calls $0.45, BB calls $0.40.

Flop: ($1.60) 7[img]/images/graemlins/diamond.gif[/img], 6[img]/images/graemlins/diamond.gif[/img], 4[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(3 players)</font>
SB checks, BB checks, <font color="#CC3333">Hero bets $1.3</font>, SB folds, <font color="#CC3333">BB raises to $2.6</font>, <font color="#CC3333">Hero push or fold?