400 NL : river decision overpair double paired board

[docnuclear]

I am pretty standard tag 22/18/3, he doesn't seem good : 47/9/3.3 on 30 hands

Full Tilt Poker, $2/$4 NL Hold'em Cash Game, 6 Players
LeggoPoker Hand History Converter

BTN: $599.55
Hero (SB): $396
BB: $394
UTG: $455.50
MP: $186.30
CO: $276.90

Pre-Flop: A[img]/images/graemlins/club.gif[/img] A[img]/images/graemlins/heart.gif[/img] dealt to Hero (SB)
2 folds, CO calls $4, BTN folds, <font color="red">Hero raises to $18</font>, BB folds, CO calls $14

Flop: ($40) 5[img]/images/graemlins/spade.gif[/img] 4[img]/images/graemlins/diamond.gif[/img] 9[img]/images/graemlins/diamond.gif[/img] (2 Players)
<font color="red">Hero bets $32</font>, CO calls $32

Turn: ($104) 9[img]/images/graemlins/club.gif[/img] (2 Players)
<font color="red">Hero bets $77</font>, CO calls $77

River: ($258) 5[img]/images/graemlins/diamond.gif[/img] (2 Players)
Hero ??