5-10 PL River Play

[Philuva]

This was my second hand so I have no reads on opponent. What should my play be on the river and any comments on the flop and turn would be appreciated.

Party Poker Pot-Limit Hold'em, $ BB (10 handed) converter

saw flop|<font color="#C00000">saw showdown</font>

MP3 ($3769)
CO ($256.5)
<font color="#C00000">Button ($2357.5)</font>
<font color="#C00000">Hero ($990)</font>
BB ($1387.5)
UTG ($1000)
UTG+1 ($1197)
UTG+2 ($802.5)
MP1 ($1657.5)
MP2 ($975)

Preflop: Hero is SB with 5[img]/images/graemlins/diamond.gif[/img], 7[img]/images/graemlins/heart.gif[/img]. Hero posts a blind of $5.
<font color="#666666">6 folds</font>, CO calls $10, Button calls $10, Hero (poster) completes, BB checks.

Flop: ($40) 3[img]/images/graemlins/club.gif[/img], 6[img]/images/graemlins/spade.gif[/img], 4[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(4 players)</font>
Hero checks, BB checks, CO checks, <font color="#CC3333">Button bets $36</font>, <font color="#CC3333">Hero raises to $100</font>, BB folds, CO folds, Button calls $64.

Turn: ($240) 3[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets $200</font>, Button calls $200.

River: ($640) 2[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
Hero ????