NL 200 - 2 pair facing river shove

[solvine]

i have just started trying to take a shot at NL 200 again, and dont know if i am being too tight on this river

Full Tilt Poker, $1/$2 NL Hold'em Cash Game, 8 Players
LegoPoker Hand History Converter

BTN: $187
SB: $74.75
BB: $88
UTG: $42.75
UTG+1: $192.75
MP1: $198
Hero (MP2): $229.15
CO: $200

Pre-Flop: Q[img]/images/graemlins/heart.gif[/img] K[img]/images/graemlins/heart.gif[/img] dealt to Hero (MP2)
3 folds, <font color="red">Hero raises to $7</font>, CO calls $7, 3 folds

Flop: ($17) 3[img]/images/graemlins/heart.gif[/img] 4[img]/images/graemlins/club.gif[/img] Q[img]/images/graemlins/diamond.gif[/img] (2 Players)
<font color="red">Hero bets $12</font>, CO calls $12

Turn: ($41) 5[img]/images/graemlins/diamond.gif[/img] (2 Players)
<font color="red">Hero bets $30</font>, CO calls $30

River: ($101) K[img]/images/graemlins/diamond.gif[/img] (2 Players)
<font color="red">Hero bets $50</font>, <font color="red">CO raises to $151 and is All-In</font>, Hero folds

Results: $201 Pot ($3 Rake)
CO mucked and WON $198 (+$99 NET)

villain is solid reg who runs at 11.33/8.37/2.9

should i have c/c river???