Should i have played any different?

[Firetrap]

Gobsmacked with this one......

OK mtt sat to Poker stars 500k - top 6 get a seat....7 left!!! Chipleader has just taken out another player hand before.......(relevant?)

Table '4045558 1' Seat #7 is the button
Seat 1: ME (11802 in chips)
Seat 2: (10778 in chips)
Seat 5: (12272 in chips)
Seat 6: (26804 in chips)
Seat 7: (3627 in chips)
Seat 8: (6652 in chips)
Seat 9: (18065 in chips)
ante 50

Seat8 posts small blind 400
Seat9 posts big blind 800
*** HOLE CARDS ***
Dealt to ME [Kc Ks]
ME: raises 1600 to 2400
Seat2: folds
Seat5: folds
Seat6:Chipleader raises 4800 to 7200
Seat7: folds
Seat8: folds
Seat9: folds

ME: raises 4552 to 11752 and is all-in
Seat6:Chipleader calls 4552
*** FLOP *** [8h Qh 2h]

*** TURN *** [8h Qh 2h] [Th]

*** RIVER *** [8h Qh 2h Th] [9c]

*** SHOW DOWN ***
ME: shows [Kc Ks] (a pair of Kings)
Chipleader: shows [Ah Jh] (a flush, Ace high)
Chipleader collected 25054 from pot
*** SUMMARY ***
Total pot 25054 | Rake 0
Board [8h Qh 2h Th 9c]
Seat 1: ME showed [Kc Ks] and lost with a pair of Kings
Seat 6: Chipleader showed [Ah Jh] and won (25054) with a flush, Ace high

OK - when he reraised he was saying im calling now no matter what, but i didnt think he had or needed aces - one ace maybe, but not 2. Still there are players with 4-6 times bb left.....surely i shouldnt have folded here......should i? Could i have played differently?

Wish i had now lol