A2s Sit and Go (first post)

[PJM1206]

I am UTG no real reads on any players I am new to Sit and Gos. I think I should have folded to the flop riase but I played it out. How should I have played this?

PokerStars Game #12341236571: Tournament #62632426, $1.00+$0.20 Hold'em No Limit - Level III (25/50) - 2007/09/29 - 15:58:32 (ET)Table '62632426 2' 9-max Seat #7 is the button
Seat 1: jcryder02 (6405 in chips)
Seat 2: Sparkxx (2450 in chips)
Seat 3: lt-john-fred (1795 in chips)
Seat 4: Hero (740 in chips)
Seat 5: JJakque (1440 in chips)
Seat 6: Jack50 (3990 in chips)
Seat 7: azcardsfanxx (2415 in chips)
Seat 8: neonon (7765 in chips)

neonon: posts small blind 25
jcryder02: posts big blind 50
Hero [Ac 2c] calls 50
Sparkxx: folds
lt-john-fred: calls 50
acegikmo1: calls 50
JJakque: folds
Jack50: folds
azcardsfanxx: folds
neonon: calls 25
jcryder02: checks

*** FLOP *** [Qc Tc 9d]
neonon: checks
jcryder02: checks
lt-john-fred: checks
acegikmo1: bets 50
neonon: folds
jcryder02: calls 50
lt-john-fred: raises 50 to 100
acegikmo1: calls 50
jcryder02: calls 50

*** TURN *** [Qc Tc 9d] [Jh]
jcryder02: checks
lt-john-fred: bets 500
acegikmo1: calls 500
jcryder02: folds

*** RIVER *** [Qc Tc 9d Jh] [9c]
lt-john-fred: checks
acegikmo1: bets 90 and is all-in
lt-john-fred: calls 90