Bubble hand... Party $11

[Raiser]

Hey guys. Really trying to improve my bubble play. This kind of hand seems to come up a lot. I hadn't had any push opportunities and my stack is getting low. I'm happy to see the Ace here, but with 2 limpers I'm not sure what to do? I figured this was my best shot at the money and pushed hoping to double up against KQ or something similar. Is this an easy fold or should I be happy to have gotten an ace at this point and push?

Party Poker No-Limit Hold'em Tourney, Big Blind is t200 (4 handed) http://216.119.70.224/converter/hhconverter.pl

saw flop|<font color="#C00000">saw showdown</font>

<font color="#C00000">BB (t3320)</font>
UTG (t1080)
Button (t2960)
<font color="#C00000">Hero (t640)</font>

Preflop: Hero is SB with A[img]/images/graemlins/diamond.gif[/img], 7[img]/images/graemlins/diamond.gif[/img].
UTG calls t200, Button calls t200, <font color="#CC3333">Hero raises to t640 (All-In)</font>, <font color="#CC3333">BB raises to t1080</font>, UTG folds, Button folds.

Flop: (t2120) J[img]/images/graemlins/heart.gif[/img], 9[img]/images/graemlins/diamond.gif[/img], 9[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players, 1 all-in)</font>

Turn: (t2120) 4[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players, 1 all-in)</font>

River: (t2120) 2[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players, 1 all-in)</font>

Final Pot: t2120