5/10 good riverbluff or completely retarded played hand?

[Kevinho_]

Party Poker (6 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

Preflop: Hero is UTG with A[img]/images/graemlins/spade.gif[/img], J[img]/images/graemlins/club.gif[/img].
<font color="#666666"> Hero raises [$35 USD]MP calls 3 folds BB calls</font>.

Flop: 7[img]/images/graemlins/diamond.gif[/img], 6[img]/images/graemlins/diamond.gif[/img], K[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(3 players)</font> pop $110
BB checks, Hero bets $80 MP calls BB folds.

Turn: J[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font> pot $270
Hero checks MP bets $200 Hero calls

River: 3[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font> pot $670
Hero bets $350


i have to edit the handhistory manually i have no clue why it doesnt show any action wtf
im not sure if my contibet is a good idea against 2 players,
on the turn i get the idea of beeing in front and on the river i cant resist to bluff to represent a high diamond because suddenly i see me behind and he could have many many hands i could get him off and i want to prevent him bluffing me out in case he has a busted draw (i.e. 89) or whatever worse than me

MP had very loose stats like a very weak player


what do you guys think?