[50nl] Call allin on river?

[hellmuth88]

Villain is 62/12/2 over 50 hands

Also is my line on the river a good one?

Full Tilt Poker - No Limit Hold'em Cash Game - $0.25/$0.50 Blinds - 5 Players - (LegoPoker HH Converter)

SB: $5.15
BB: $8.90
Hero (UTG): $73.35
CO: $102.90
BTN: $75.35

Preflop: Hero is dealt Q[img]/images/graemlins/diamond.gif[/img] K[img]/images/graemlins/club.gif[/img] (5 Players)
<font color="red">Hero raises to $1.75</font>, CO folds, BTN calls $1.75, 2 folds

Flop: ($4.25) K[img]/images/graemlins/diamond.gif[/img] 4[img]/images/graemlins/diamond.gif[/img] 6[img]/images/graemlins/diamond.gif[/img] (2 Players)
<font color="red">Hero bets $4.00</font>, BTN calls $4.00

Turn: ($12.25) A[img]/images/graemlins/heart.gif[/img] (2 Players)
Hero checks, <font color="red">BTN bets $7.50</font>, Hero calls $7.50

River: ($27.25) K[img]/images/graemlins/spade.gif[/img] (2 Players)
<font color="red">Hero bets $15.00</font>, <font color="red">BTN raises all-in to $62.10</font>, Hero ???