Turned set gets checkraised on river

[eyedol]

First session I play against UTG which nick is TexIvey. He has 32/29/1.7 after about 80 hands. My image at the table is TAG, 19/15/3.2

Party Poker No-Limit Hold'em, $ BB (6 handed)

BB ($564)
UTG ($624.50)
Hero ($772.75)
CO ($600)
Button ($946.08)
SB ($755)

Preflop: Hero is MP with 9[img]/images/graemlins/heart.gif[/img], 9[img]/images/graemlins/spade.gif[/img]. SB posts a blind of $3.
<font color="#CC3333">UTG raises to $22</font>, Hero calls $22, <font color="#666666">3 folds</font>, BB calls $16.

Flop: ($69) 6[img]/images/graemlins/club.gif[/img], Q[img]/images/graemlins/diamond.gif[/img], 7[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(3 players)</font>
BB checks, UTG checks, Hero checks.

Turn: ($69) 9[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(3 players)</font>
BB checks, UTG checks, <font color="#CC3333">Hero bets $51</font>, BB folds, UTG calls $51.

River: ($171) K[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
UTG checks, <font color="#CC3333">Hero bets $112</font>, <font color="#CC3333">UTG raises to $462</font>, Hero ?

Suggestions?