A4s against 2 unknown

[Falcon900EX]

Hello all had no big read on the guys.
Was my play correct here or should i back of on the turn or fire again on the river ?
What you guys think.
Pretty new to 6max
Tx

Party Poker 1/2 Hold'em (6 max, 6 handed) converter

Preflop: Hero is Button with 4[img]/images/graemlins/club.gif[/img], A[img]/images/graemlins/club.gif[/img].
<font color="#666666">1 fold</font>, MP calls, <font color="#666666">1 fold</font>, <font color="#CC3333">Hero raises</font>, SB calls, BB calls, MP calls.

Flop: (8 SB) 3[img]/images/graemlins/spade.gif[/img], K[img]/images/graemlins/spade.gif[/img], 9[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(4 players)</font>
SB checks, BB checks, MP checks, <font color="#CC3333">Hero bets</font>, SB calls, BB folds, MP calls.

Turn: (5.50 BB) 2[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(3 players)</font>
SB checks, MP checks, <font color="#CC3333">Hero bets</font>, SB folds, MP calls.

River: (7.50 BB) 6[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
MP checks, Hero checks.

Final Pot: 7.50 BB

[Poldi]

I limp preflop and check-fold the flop. Given how you played it you must take the free card on the turn. Hoping for both players to fold is leaving money on the table at 1/2.