Been looking at my hand history, and here is my key hand of the tourny.

PokerStars Game #71183034469: Tournament #470946157, $1.00+$0.10 USD Hold'em No Limit - Level XX (700/1400) - 2011/11/26 16:12:14 ET
Table '470946157 335' 6-max Seat #2 is the button
Seat 1: Pavel-1294 (26625 in chips) 
Seat 2: valirar888 (59597 in chips) 
Seat 3: Moizt (55636 in chips) 
Seat 4: hugán (36472 in chips) 
Seat 5: pepe 172304 (23007 in chips) 
Seat 6: vaniasha (24599 in chips) 
Pavel-1294: posts the ante 175
valirar888: posts the ante 175
Moizt: posts the ante 175
hugán: posts the ante 175
pepe 172304: posts the ante 175
vaniasha: posts the ante 175
Moizt: posts small blind 700
hugán: posts big blind 1400
*** HOLE CARDS ***
Dealt to Moizt [Qc Qh]
pepe 172304: folds 
vaniasha: raises 1400 to 2800
Pavel-1294: folds 
valirar888: folds 
Moizt: raises 52661 to 55461 and is all-in
hugán: folds 
vaniasha: calls 21624 and is all-in
Uncalled bet (31037) returned to Moizt
*** FLOP *** [3d Ah 9d]
*** TURN *** [3d Ah 9d] [9s]
*** RIVER *** [3d Ah 9d 9s] [8h]
*** SHOW DOWN ***
Moizt: shows [Qc Qh] (two pair, Queens and Nines)
vaniasha: shows [Kd Ad] (two pair, Aces and Nines)
vaniasha collected 51298 from pot
*** SUMMARY ***
Total pot 51298 | Rake 0 
Board [3d Ah 9d 9s 8h]
Seat 1: Pavel-1294 folded before Flop (didn't bet)
Seat 2: valirar888 (button) folded before Flop (didn't bet)
Seat 3: Moizt (small blind) showed [Qc Qh] and lost with two pair, Queens and Nines
Seat 4: hugán (big blind) folded before Flop
Seat 5: pepe 172304 folded before Flop (didn't bet)
Seat 6: vaniasha showed [Kd Ad] and won (51298) with two pair, Aces and Nines

My thought process was that shoving with Q Q would be a +EV move since there was dead money in the pot, and I had a relatively agressive image. Should i be flatting preflop instead and see a flop with my queens? I feel like I played the hand really bad looking back, but I would like the input of some pros to see what they think. Don't hesitate to bash my play, I can take it. Remember, I'm posting this to learn from my mistake.