How to play this draw?

[castigar]

I'd like to know what to do when I CB a draw and I get raised.. Is it a fold?

Full Tilt Poker - No Limit Hold'em Cash Game - $0.10/$0.25 Blinds - 4 Players - (LegoPoker HH Converter)

SB: $27.60
BB: $25.90
UTG: $27.10
Hero (BTN): $25.00

Preflop: Hero is dealt K[img]/images/graemlins/spade.gif[/img] 8[img]/images/graemlins/spade.gif[/img] (4 Players)
UTG calls $0.25, <font color="red">Hero raises to $1.10</font>, 2 folds, UTG calls $0.85

Flop: ($2.55) 6[img]/images/graemlins/spade.gif[/img] Q[img]/images/graemlins/spade.gif[/img] Q[img]/images/graemlins/club.gif[/img] (2 Players)
UTG checks, <font color="red">Hero bets $2.00</font>, <font color="red">UTG raises to $6.00</font>, Hero calls $4.00

Turn: ($14.55) 4[img]/images/graemlins/club.gif[/img] (2 Players)
UTG checks, Hero checks

River: ($14.55) 2[img]/images/graemlins/heart.gif[/img] (2 Players)
<font color="red">UTG bets $13.25</font>, Hero folds
Uncalled bet of $13.25 returned to UTG

Pot Size: $14.55 ($0.70 Rake)