PP NLH tourney, late rounds .. did i play this one right? . ..

[ReDeYES88]

late rounds of a cheapo 5+1 NL tourney at PP.
+/- 60 players left out of 1000, average stack +/- 15k
CO w/the big stack (tourney chip leader) just flashed KK the previous hand, so i seriously doubted that he had another big pair. He had been stealing several pots with big bets, and had been caught a few times.
I'm sitting in about 10th in chips. Do I call and try to double up to become the chip leader by 20k chips, or muck and be happy that I'm still in about 15th place? I raised 4x the BB preflop, should it have been more? Any suggestions welcome

Party Poker No-Limit Hold'em Tourney, Big Blind is t1500 (9 handed)

saw flop|<font color="C00000">saw showdown</font>

MP3 (t4591)
<font color="C00000">CO (t63349)</font>
Button (t14491)
SB (t850)
BB (t18526)
UTG (t14936)
UTG+1 (t26717)
<font color="C00000">Hero (t32375)</font>
MP2 (t9106)

Preflop: Hero is MP1 with Q[img]/images/graemlins/club.gif[/img], Q[img]/images/graemlins/spade.gif[/img].
UTG folds, UTG+1 folds, <font color="CC3333">Hero raises to t6000</font>, MP2 folds, MP3 folds, <font color="CC3333">CO raises to t63349 (All-In)</font>, Button folds, SB folds, BB folds, Hero calls t26375 (All-In).

Flop: (t97974) 4[img]/images/graemlins/club.gif[/img], 3[img]/images/graemlins/diamond.gif[/img], T[img]/images/graemlins/diamond.gif[/img] <font color="blue">(2 players, 2 all-in)</font>

Turn: (t97974) 9[img]/images/graemlins/diamond.gif[/img] <font color="blue">(2 players, 2 all-in)</font>

River: (t97974) K[img]/images/graemlins/diamond.gif[/img] <font color="blue">(2 players, 2 all-in)</font>

Final Pot: t97974

Results in white below: <font color="white">
Hero shows Qc Qs (one pair, queens).
CO shows Qd Ac (flush, king high).
Outcome: CO wins t97974. </font>