Omaha hand. Explanation please.

I'm playing a little play money omaha hi here. It's like a huge bingo haha. I must be missing something about he rules though.
Anyway, the guy with the Ace of hearts, why doesn't he win the hand with an ace-high flush since there is 4 hearts on the board? Someone help me out please...


*** RIVER *** [9h Js 7h 8h] K♥
*** SHOW DOWN ***
Poker M8rix: shows [6d Jh Qd 9s] (two pair, Jacks and Nines)
pecosa07: shows [7s 9d 4h 7c] (three of a kind, Sevens)
pecosa07 collected 8420 from side pot-2
topfrog302: shows [4c Kc Ac Ah] (a pair of Aces)
pecosa07 collected 15 from side pot-1
Eiroa: shows [5c Th Qh 7d] (a flush, King high)
Eiroa collected 4195 from main pot
*** SUMMARY ***
Total pot 12630 Main pot 4195. Side pot-1 15. Side pot-2 8420. | Rake 0
Board [9h Js 7h 8h Kh]
Seat 1: Poker M8rix (big blind) showed [6d Jh Qd 9s] and lost with two pair, Jacks and Nines
Seat 4: topfrog302 showed [4c Kc Ac Ah] and lost with a pair of Aces
Seat 5: Eiroa showed [5c Th Qh 7d] and won (4195) with a flush, King high
Seat 6: pecosa07 (button) showed [7s 9d 4h 7c] and won (8435) with three of a kind, Sevens
Seat 7: Galina31 (small blind) folded on the Flop

You have to use two of your cards, not one. Regardless of what is on the board, without exception players must use three cards from the board and two from their hand.

Oh craps! Thanks. I thought you used the whole board with 2 of the holes. That complicates things a bit I suppose.

No problem. I made that mistake too when I first started playing because I was so used to playing NLH.

we've all made the same mistake, even worse when playing omaha hl, fortunately i started playing on play money tables to learn the game so saved me a fortune