Can't win with those Big Pocket Pairs- bad luck or mistake?

[P0kerJunkie]

Full Tilt Poker
$0.25/$0.50 –
No Limit Hold'em
VILLAIN ($196.95)
HERO ($32.30)
*** HOLE CARDS ***
Dealt to HERO [Qh Qd]
HERO (UTG) raises to $2
UTG+1 folds
UTG+2 folds
UTG+3 folds
UTG+4 folds
VILLAIN calls $2
SB calls $1.75
*** FLOP *** [Jd 2h 4c]
SB checks
HERO bets $5
VILLAIN calls $5
SB folds
*** TURN *** [Jd 2h 4c] [8h]
HERO checks
VILLAIN bets $5
STEVO calls $5
*** RIVER *** [Jd 2h 4c 8h] [Ac]
HERO checks
VILLAIN bets $7
HERO calls $7
*** SHOW DOWN ***
VILLAIN shows [2c 2d] three of a kind, Twos
HERO mucks
VILLAIN wins the pot ($38.50) with three of a kind, Twos

Not sure if I made too many mistakes here- pf raise 4xbb then lead out on the flop a little less than the size of the pot
Checked/called the turn – intended to lead out on the river until the ace came
River was an obvious scare card, but I had to call – was kind of pot stuck
Mistakes?
Thoughts?