KK sh

Full Tilt - $0.25 NL (6 max) - Holdem - 6 players

UTG: $21.49 (VPIP: 19.59, PFR: 4.12, 3Bet Preflop: 5.88, Hands: 102)
MP: $19.10 (VPIP: 18.18, PFR: 13.64, 3Bet Preflop: 0.00, Hands: 46)
Hero (CO): $29.37
BTN: $35.99 (VPIP: 22.37, PFR: 17.45, 3Bet Preflop: 3.52, Hands: 705)
SB: $25.45 (VPIP: 25.54, PFR: 21.74, 3Bet Preflop: 4.69, Hands: 191)
BB: $27.50 (VPIP: 28.81, PFR: 21.19, 3Bet Preflop: 7.50, Hands: 312)

SB posts SB $0.10, BB posts BB $0.25

Pre Flop: (pot: $0.35) Hero has K K
UTG calls $0.25, MP calls $0.25, Hero raises to $1.00, fold, fold, fold, UTG calls $0.75, MP calls $0.75

Flop : ($3.35, 3 players) 4 T 9
UTG checks, MP checks, Hero bets $3.00, fold, MP calls $3.00

Turn : ($9.35, 2 players) 3
MP checks, Hero bets $6.50, MP calls $6.50

River : ($22.35, 2 players) 8
MP bets $8.60 and is all-in, fold

My thought process was like this...power bet the flop to see if there are anyone limped with a big PP or found a set...I then bet large enough to deter FD odds and enough to fold if jammed by a set...

The river is the worst card in the deck...and he instantly jams...I fold, I don't think I'm beating anything but a bluff...is this line ok, I think PF should be larger ($1.25-$1.50), but other then that...any points of improvement??

Cheers,
TC