KK on the button - Where did it go wrong?

[bukkrukk]

20$ NL SnG.

20/40 blinds. All active players have stacks around T1000.

Hero has KK on the button.

Ep1 calls 20. MP1 raises 180. MP2 calls. Hero Calls. EP1 calls.

Flop J[img]/images/graemlins/club.gif[/img]4 [img]/images/graemlins/spade.gif[/img] 5[img]/images/graemlins/heart.gif[/img]

EP1 goes allin for 440. MP1 Calls. MP2 calls. Hero calls.

Turn
3[img]/images/graemlins/heart.gif[/img]

MP1 checks, MP2 goes allin for 160. Hero calls. MP1 calls.

River
A [img]/images/graemlins/spade.gif[/img]

MP1 and Hero Checks.