POKERROOM FREEROLL HAND QUESTION

ok me and another guy where chip leaders with about the same stack.
I'm really bothered by the way I played this hand, but I would like to know your pro opinion on how would you have played the hand perhaps or advise me on betting habits, which I believe is my main weakness.

I know I f* it up but being a noob at poker (playing only a month) I appreciate any advise. [img]/images/graemlins/smile.gif[/img]


Seat 1: charbroil23 ($7,090 in chips)
Seat 2: RACEFAN25 ($15,928 in chips)
Seat 3: mimik2005 [JD,KS] ($25,540 in chips)
Seat 4: ATrain86 ($11,122 in chips)
Seat 5: KurtCobainAA ($16,701 in chips)
Seat 6: JohnUtah29 ($8,960 in chips)
Seat 8: oneyedwebber ($7,655 in chips)
Seat 9: ACES-R-US1 ($225 in chips)
Seat 10: djn1105 ($25,802 in chips)



ANTES/BLINDS
JohnUtah29 posts blind ($200), oneyedwebber posts blind ($400).

PRE-FLOP
ACES-R-US1 folds, djn1105 bets $800, charbroil23 folds, RACEFAN25 folds, mimik2005 calls $800, ATrain86 folds, KurtCobainAA folds, JohnUtah29 folds, oneyedwebber folds.

FLOP [board cards 4C,KH,4H ]
djn1105 bets $500, mimik2005 bets $2,000, djn1105 bets $3,000, mimik2005 calls $1,500.

TURN [board cards 4C,KH,4H,7C ]
djn1105 bets $800, mimik2005 bets $6,000, djn1105 bets $20,702 and is all-in, mimik2005 calls $15,240 and is all-in.

RIVER [board cards 4C,KH,4H,7C,JS ]