Can i fold my full house on his river all in bet?

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Full Tilt Poker Game #3876354886: Table Sterling Silver - $0.10/$0.25 - No Limit Hold'em - 20:14:35 ET - 2007/10/16
Seat 1: sakaar ($8.30)
Seat 2: campb86508 ($18.45)
Seat 4: JSweet84 ($27.85)
Seat 5: shramrock ($11.95)
Seat 6: namit101 ($26.05)
Seat 7: HillBillyCPA ($22.95)
Seat 8: killazg ($8.45), is sitting out
shramrock posts the small blind of $0.10
namit101 posts the big blind of $0.25
The button is in seat #4
*** HOLE CARDS ***
Dealt to JSweet84 [6h 6s]
HillBillyCPA folds
sakaar folds
campb86508 has 15 seconds left to act
campb86508 folds
JSweet84 raises to $0.85
shramrock folds
namit101 calls $0.60
*** FLOP *** [Ad Qc 6c]
namit101 checks
JSweet84 checks
*** TURN *** [Ad Qc 6c] [Kh]
namit101 bets $1.80
gosox82 sits down
JSweet84 raises to $6
gosox82 adds $10
namit101 calls $4.20
*** RIVER *** [Ad Qc 6c Kh] [As]
namit101 bets $19.20, and is all in
Ski754 sits down
JSweet84 has 15 seconds left to act
Ski754 stands up
JSweet84 has requested TIME
Larry828 sits down
JSweet84 calls $19.20
*** SHOW DOWN ***
namit101 shows [Kd Ac] a full house, Aces full of Kings
Larry828 adds $25
JSweet84 mucks
namit101 wins the pot ($49.60) with a full house, Aces full of Kings
*** SUMMARY ***
Total pot $52.20 | Rake $2.60
Board: [Ad Qc 6c Kh As]
Seat 1: sakaar didn't bet (folded)
Seat 2: campb86508 didn't bet (folded)
Seat 4: JSweet84 (button) mucked [6h 6s] - a full house, Sixes full of Aces
Seat 5: shramrock (small blind) folded before the Flop
Seat 6: namit101 (big blind) showed [Kd Ac] and won ($49.60) with a full house, Aces full of Kings
Seat 7: HillBillyCPA didn't bet (folded)
Seat 8: killazg is sitting out