What did I do wrong?
 

UTG+1 is a preflop LAG, post flop calling station. I've seen him raise with any two cards twice before this hand, and raise several other times with marginal hands like QTo, and K3s. After the flop, I put him on two big cards. When he checked the turn, I figured for sure he had two big cards and I wanted to get him out, hence my large bet... I didn't want him hitting a bigger pair. Obviously, I misread the situation. Thanks in advance for your advice and criticism.

Party Poker No-Limit Hold'em Tourney, Big Blind is t15 (10 handed) converter

BB (t1035)
UTG (t990)
UTG+1 (t1130)
UTG+2 (t975)
MP1 (t790)
MP2 (t1140)
MP3 (t975)
CO (t1020)
ZootMurph (t960)
SB (t985)

Preflop: ZootMurph is Button with 6[img]/images/graemlins/spade.gif[/img], 6[img]/images/graemlins/heart.gif[/img].
UTG folds, <font color="CC3333">UTG+1 raises to t60</font>, UTG+2 folds, MP1 folds, MP2 folds, MP3 folds, CO folds, ZootMurph calls t60, SB folds, BB calls t45.

Flop: (t190) 9[img]/images/graemlins/heart.gif[/img], 3[img]/images/graemlins/spade.gif[/img], 3[img]/images/graemlins/diamond.gif[/img] <font color="blue">(3 players) </font>
BB checks, <font color="CC3333">UTG+1 bets t150</font>, ZootMurph calls t150, BB folds.

Turn: (t490) 9[img]/images/graemlins/spade.gif[/img] <font color="blue">(2 players) </font>
UTG+1 checks, <font color="CC3333">ZootMurph bets t400</font>, <font color="CC3333">UTG+1 raises to t800</font>, ZootMurph calls t350 (All-In).

River: (t2040) K[img]/images/graemlins/spade.gif[/img] <font color="blue">(2 players, 1 all-in) </font>

Final Pot: t2040
<font color="#990066">Main Pot: t1990 (t1990), between UTG+1 and ZootMurph.</font> &gt; <font color="white">Pot won by UTG+1 (t1990).</font>
<font color="#990066">Pot 2: t50 (t50), overbet by UTG+1.</font>

Results in white below: <font color="white">
UTG+1 shows 9c 5c (full house, nines full of threes).
ZootMurph shows 6s 6h (two pair, nines and sixes).
Outcome: UTG+1 wins t2040. </font>

Re: What did I do wrong?
 

Well I wouldn't get involved in the first place, unless more players came in.

I can't see me calling the flop either, if I think he's pushing his overcards I'll raise him but likely I'll fold, seeing as you say he's actually passive postflop.

Check the turn through.