How is my play on this set? ($6 turbo)

I'm not sure how to play this hand. Do I raise this flop? I flat called hoping someone would be slowplaying some ace (the $6 people seem to love doing this) and put in a nice-sized check raise. That didnt happen, but I decided it was extraction time on the turn. Is the raise to 300 too small? Also, is the 400 on the river the right sized value bet?

PokerStars Game #3032850501: Tournament #14985252, Hold'em No Limit - Level I (10/20) - 2005/11/11 - 18:25:55 (ET)
Table '14985252 1' Seat #1 is the button
Seat 1: IMSAKIDD (1500 in chips)
Seat 2: dcldcl (1500 in chips)
Seat 3: chic03 (1500 in chips)
Seat 4: molloy64 (1500 in chips)
Seat 5: Amyc75 (1500 in chips)
Seat 6: Vidor (1500 in chips)
Seat 7: Zimbru (1500 in chips)
Seat 8: 79porsche911 (1500 in chips)
Seat 9: Dr. BarkOOn (1500 in chips)
dcldcl: posts small blind 10
chic03: posts big blind 20
*** HOLE CARDS ***
Dealt to IMSAKIDD [4c 4d]
molloy64: folds
Amyc75: calls 20
Vidor: folds
Zimbru: calls 20
79porsche911: folds
Dr. BarkOOn: calls 20
IMSAKIDD: calls 20
dcldcl: calls 10
chic03: checks
*** FLOP *** [Ks Ad 4s]
dcldcl: checks
chic03: checks
Amyc75: checks
Zimbru: checks
Dr. BarkOOn: bets 100
IMSAKIDD: calls 100
dcldcl: folds
chic03: calls 100
Amyc75: folds
Zimbru: calls 100
*** TURN *** [Ks Ad 4s] [8h]
chic03: checks
Zimbru: checks
Dr. BarkOOn: bets 120
IMSAKIDD: raises 180 to 300
chic03: folds
Zimbru: calls 300
Dr. BarkOOn: calls 180
*** RIVER *** [Ks Ad 4s Ks] [6d]
Zimbru: checks
Dr. BarkOOn: checks
IMSAKIDD: bets 400
Zimbru: folds
Dr. BarkOOn: calls 400
*** SHOW DOWN ***
IMSAKIDD: shows [4c 4d] (three of a kind, Fours)
Dr. BarkOOn: mucks hand
IMSAKIDD collected 2220 from pot
*** SUMMARY ***
Total pot 2220 | Rake 0
Board [Ks Ad 4s Ks Ad 4s 8h 6d]
Seat 1: IMSAKIDD (button) showed [4c 4d] and won (2220) with three of a kind, Fours
Seat 2: dcldcl (small blind) folded on the Flop
Seat 3: chic03 (big blind) folded on the Turn
Seat 4: molloy64 folded before Flop (didn't bet)
Seat 5: Amyc75 folded on the Flop
Seat 6: Vidor folded before Flop (didn't bet)
Seat 7: Zimbru folded on the River
Seat 8: 79porsche911 folded before Flop (didn't bet)
Seat 9: Dr. BarkOOn mucked [Jd Ac]

[bluefeet]

You need to raise the flop. With the FD on board, with four "check"s behind you, the pot is getting WAY too juicy. I would make it t300-400 to go (given a $6, you will likely get your call from the Ace...and maybe a draw - at a much better price of course).

Back to your line.......raise more on the turn. Your turn to act, still 2 others in the hand, facing a pot of t620. I would reraise to t600-700ish. Not a bad place to pick up the pot here. You need to give clear incorrect odds for the draw (had you raised the flop, facing a pot of t1000 or more, it'd be time to push this safe turn).

River - fine, given your line to this point. If the Ace hasn't left now, he's pretty certain to pay you off here. Had you taken a more aggressive approach, we wouldn't have gotten this far.

[cha59]

I usually raise the flop to about 300 there. I dont think you see raises from the people behind you often enough to go for a reraise there.

Slowplaying a set with a two tone flop is a good way to get into trouble, especially with that many opponents.