PokerStars No-Limit Hold'em, $0.10 BB (6 handed) - Poker-Stars Converter Tool from FlopTurnRiver.com

Hero (Button) ($13.10)
SB ($9.50)
BB ($18)
UTG ($13.30)
MP ($12.05)
CO ($11)

Preflop: Hero is Button with K, A
UTG calls $0.10, 1 fold, CO calls $0.10, Hero raises to $0.60, SB calls $0.55, 2 folds, CO calls $0.50

Flop: ($2) 6, 9, K (3 players)
SB checks, CO checks, Hero bets $1.30, 1 fold, CO calls $1.30

Turn: ($4.60) 9 (2 players)
CO checks, Hero bets $3, CO calls $3

River: ($10.60) 5 (2 players)
CO checks, Hero checks

Total pot: $10.60 | Rake: $0.50

Results:
Hero mucked K, A (two pair, Kings and nines).
CO had 7, 8 (straight, nine high).
Outcome: CO won $10.10

Am I betting too small? Villain is the biggest calling station I met... no matter if you raise pre-flop.. he calls everything.