Can someone identify my flaw here?

[Colombo]

A little bit after first break in the Stars 25,000 Guaranteed.
No reads on the villian really.

PokerStars No-Limit Hold'em Tourney, Big Blind is t200 (9 handed) converter

CO (t13210)
Button (t4750)
SB (t4205)
BB (t11125)
UTG (t9725)
UTG+1 (t9045)
Hero (t16160)
MP2 (t6363)
MP3 (t17737)

Preflop: Hero is MP1 with A[img]/images/graemlins/heart.gif[/img], K[img]/images/graemlins/club.gif[/img].
<font color="#666666">2 folds</font>, <font color="#CC3333">Hero raises to t700</font>, MP2 calls t700, MP3 calls t700, <font color="#666666">4 folds</font>.

Flop: (t2400) A[img]/images/graemlins/spade.gif[/img], 3[img]/images/graemlins/heart.gif[/img], 2[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(3 players)</font>
<font color="#CC3333">Hero bets t1600</font>, MP2 folds, MP3 calls t1600.

Turn: (t5600) T[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets t2500</font>, MP3 calls t2500.

River: (t10600) J[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets t3800</font>, <font color="#CC3333">MP3 raises to t12937</font>, Hero calls t7560 (All-In).

Final Pot: t34897