raising a c-bet with underpair 50nl

[prodonkey]

Villain is 18/18/6

Is this a good flop to try this on??

Full Tilt Poker, $0.25/$0.50 NL Hold'em Cash Game, 6 Players
LegoPoker Hand History Converter

SB: $45.50
Hero (BB): $49.25
UTG: $30.10
MP: $9.05
CO: $56.85
BTN: $49.25

Pre-Flop: 8 8[img]/images/graemlins/spade.gif[/img] dealt to Hero (BB)
3 folds, <font color="red">BTN raises to $1.75</font>, SB folds, Hero calls $1.25

Flop: ($3.75) 7[img]/images/graemlins/spade.gif[/img] J 9[img]/images/graemlins/spade.gif[/img] (2 Players)
Hero checks, <font color="red">BTN bets $3.40</font>, <font color="red">Hero raises to $13.45</font>