Whats wrong with this hand?

[Margin Of Error]

PokerStars Game #5807619748: Tournament #28909384, $3+$0 Hold'em No Limit - Level V (75/150) - 2006/08/05 - 15:12:20 (ET)
Table '28909384 17' 9-max Seat #2 is the button
Seat 1: steveb1971 (1975 in chips)
Seat 2: 1haiduc (10750 in chips)
Seat 3: jkr1 (1120 in chips)
Seat 4: M.T.Martian (3740 in chips)
Seat 5: fdawk48 (16970 in chips)
Seat 6: Bellmarce (17075 in chips)
Seat 7: sausage100 (10455 in chips)
Seat 8: aldoray (8120 in chips)
Seat 9: MarginOfErrr (8265 in chips)
jkr1: posts small blind 75
M.T.Martian: posts big blind 150
*** HOLE CARDS ***
Dealt to MarginOfErrr [Ah Qc]
fdawk48: folds
Bellmarce: folds
sausage100: folds
aldoray: raises 450 to 600
MarginOfErrr: calls 600
steveb1971: folds
1haiduc: folds
jkr1: folds
M.T.Martian: folds
*** FLOP *** [2c Qh 7c]
aldoray: checks
MarginOfErrr: bets 150
aldoray: calls 150
*** TURN *** [2c Qh 7c] [9h]
aldoray: checks
MarginOfErrr: bets 450
aldoray: calls 450
*** RIVER *** [2c Qh 7c 9h] [7h]
aldoray: bets 6920 and is all-in
MarginOfErrr: calls 6920
*** SHOW DOWN ***

[Sprayed]

Your flop bet was too small. Bet 2/3 to full pot. You are giving him the right price to call by betting 150. He's either on a draw or he hit the 7 on the flop. I would guess that he hit trips with his A7 on the river or he missed his draw and he is trying to bluff you off the hand.

[swiggidy]

Your flop bet was too small. Bet 2/3 to full pot. You are giving him the right price to call

And your turn bet is too small. Bet 1/2-3/4 pot. You are giving him the right price to call

[Hartlin]

and more often than not, your call on his river push?