I don't like how I played this, what should I have done? The turn and river bets were so small....I felt like I should call even though I was pretty sure I was beat.

POKERSTARS GAME #5154835314: HOLD'EM NO LIMIT ($0.25/$0.50) - 2006/06/04 - 21:08:33 (ET)
Table 'Unukalhai V' 9-max Seat #9 is the button
Seat 1: dtrain17 ($88.50 in chips)
Seat 2: SICKTIGHT311 ($28.15 in chips)
Seat 3: Rockymv ($49 in chips)
Seat 4: garyfmarsh ($51.10 in chips)
Seat 5: 928racer ($44.25 in chips)
Seat 6: nastyned420 ($44.40 in chips)
Seat 7: HENRYSFORK ($37.80 in chips)
Seat 8: MoTheMaster ($50.10 in chips)
Seat 9: Nando71 ($45.25 in chips)
dtrain17: posts small blind $0.25
SICKTIGHT311: posts big blind $0.50
*** HOLE CARDS ***
Dealt to Rockymv [As Ks]
Rockymv: raises $1.50 to $2
garyfmarsh: folds
928racer: folds
nastyned420: calls $2
HENRYSFORK: folds
MoTheMaster: folds
Nando71: calls $2
dtrain17: folds
SICKTIGHT311: folds
*** FLOP *** [Qs 2c Tc]
Rockymv: bets $4.50
nastyned420: folds
Nando71: raises $4.50 to $9
Rockymv: calls $4.50
*** TURN *** [Qs 2c Tc] [Ah]
Rockymv: checks
Nando71: bets $6.50
Rockymv: calls $6.50
*** RIVER *** [Qs 2c Tc Ah] [Ac]
Rockymv: checks
Nando71: bets $12.50
Rockymv: calls $12.50