Super Sat hand played poorly

[Chaostracize]

No reads. How badly did I misplay?

Edit: Top two get seat, 95ish left.

Party Poker No-Limit Hold'em Tourney, Big Blind is t100 (9 handed) FTR converter on zerodivide.cx (http://www.zerodivide.cx/converter)

SB (t2843)
BB (t2912)
UTG (t3881)
UTG+1 (t605)
MP1 (t5287)
MP2 (t4396)
MP3 (t2950)
Hero (t1965)
Button (t5625)

Preflop: Hero is CO with 5/images/graemlins/diamond.gif, A/images/graemlins/diamond.gif.
<font color="#666666">2 folds</font>, MP1 calls t100, <font color="#666666">1 fold</font>, MP3 calls t100, Hero calls t100, Button calls t100, SB completes, BB checks.

Flop: (t600) A/images/graemlins/heart.gif, K/images/graemlins/club.gif, 8/images/graemlins/diamond.gif <font color="#0000FF">(6 players)</font>
SB checks, BB checks, <font color="#CC3333">MP1 bets t100</font>, MP3 folds, Hero calls t100, Button folds, SB folds, BB folds.

Turn: (t800) 5/images/graemlins/club.gif <font color="#0000FF">(2 players)</font>
<font color="#CC3333">MP1 bets t100</font>, <font color="#CC3333">Hero raises to t400</font>, MP1 calls t300.

River: (t1600) 7/images/graemlins/spade.gif <font color="#0000FF">(2 players)</font>
<font color="#CC3333">MP1 bets t100</font>...

[betgo]

You could fold preflop, but limping is OK.

I would bet a little more on the turn.

Push the river and hope aces up are good.

Did you lose to a straight?