Flamed for raising. Was I out of line?

[AnyAce]

Hey all,
Just wondering how well I played this hand. I took a lot of heat from MP1 for my flop raise. Any thoughts on how I played the hand, particularly the flop.

Thanks in advance.

PokerStars 5/10 Omaha/8 (8 handed) converter

Preflop: Hero is CO with A[img]/images/graemlins/heart.gif[/img], T[img]/images/graemlins/heart.gif[/img], Q[img]/images/graemlins/club.gif[/img], 2[img]/images/graemlins/club.gif[/img].
<font color="#666666">1 fold</font>, <font color="#CC3333">UTG+1 raises</font>, MP1 calls, <font color="#666666">1 fold</font>, <font color="#CC3333">Hero 3-bets</font>, <font color="#666666">3 folds</font>, UTG+1 calls, MP1 calls.

Flop: (10.40 SB) 5[img]/images/graemlins/heart.gif[/img], K[img]/images/graemlins/spade.gif[/img], 7[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(3 players)</font>
UTG+1 checks, <font color="#CC3333">MP1 bets</font>, <font color="#CC3333">Hero raises</font>, UTG+1 calls, <font color="#CC3333">MP1 3-bets</font>, Hero calls, UTG+1 calls.

Turn: (9.70 BB) 9[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(3 players)</font>
UTG+1 checks, MP1 checks, <font color="#CC3333">Hero bets</font>, UTG+1 calls, MP1 calls.

River: (12.70 BB) 8[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(3 players)</font>
UTG+1 checks, MP1 checks, <font color="#CC3333">Hero bets</font>, UTG+1 calls, MP1 calls.

Final Pot: 15.70 BB

Results in white below: <font color="#FFFFFF">
UTG+1 has Ac 5c 2h Jd (Low: 8, 7, 5, 2, A | High: flush, nine high).
MP1 has Ad 9d As 3d (Low: 8, 7, 5, 3, A | High: one pair, aces).
Hero has Ah Th Qc 2c (Low: 8, 7, 5, 2, A | High: flush, ace high).
Outcome: Hero wins 11.77 BB. UTG+1 wins 3.92 BB. </font>