99 river play?

[igbr1]

Please, give me some advice how should I play this hand?

Party Poker 0.50/1.00 Hold'em <font color="#0000FF">(9 handed)</font> link

SB ($29.50)
BB ($24.26)
UTG ($28.25)
UTG+1 ($31.38)
MP1 ($25.75)
Hero ($44.75)
MP3 ($24.25)
CO ($7.50)
Button ($21.50)

Preflop: Hero is MP2 with 9[img]/images/graemlins/heart.gif[/img], 9[img]/images/graemlins/diamond.gif[/img].
<font color="#666666">1 folds</font>, UTG+1 calls, <font color="#666666">1 folds</font>, Hero calls, <font color="#666666">1 folds</font>, CO calls, <font color="#CC3333">Button raises</font>, <font color="#666666">2 folds</font>, UTG+1 calls, Hero calls, CO calls.

Flop: (9.50 SB) 2[img]/images/graemlins/club.gif[/img], 7[img]/images/graemlins/heart.gif[/img], 6[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(4 players)</font>
<font color="#CC3333">UTG+1 bets</font>, <font color="#CC3333">Hero raises</font>, CO folds, Button calls, UTG+1 calls.

Turn: (7.75 BB) 8[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(3 players)</font>
UTG+1 checks, <font color="#CC3333">Hero bets</font>, Button calls, UTG+1 calls.

River: (10.75 BB) 8[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(3 players)</font>
UTG+1 checks, Hero checks, <font color="#CC3333">Button bets</font>, UTG+1 folds, Hero calls.

Final Pot: 12.75 BB.