Was I suppose to value bet?

[llamaoo7]

This is my first post on 2+2, so I hope it's a good one. I've been lurking the past month or so and the advice given here has been proven to be the best by far for microlimits. Thanks guys and SSH. Feel free to give general comments about the hand and how I played it anywhere.

MP2, CO, and SB are fish. BB is solid.
Party Poker 0.5/1 Hold'em (10 handed) converter

Preflop: Hero is UTG+1 with K[img]/images/graemlins/spade.gif[/img], Q[img]/images/graemlins/club.gif[/img]. MP1 posts a blind of $0.5.
<font color="#666666">1 fold</font>, <font color="#CC3333">Hero raises</font>, <font color="#666666">2 folds</font>, MP2 calls, <font color="#666666">1 fold</font>, CO calls, <font color="#666666">1 fold</font>, SB calls, BB calls.

UTG with KQo raises on Party .5/1 at a loosy goosy table, right?

Flop: (11 SB) Q[img]/images/graemlins/heart.gif[/img], 9[img]/images/graemlins/diamond.gif[/img], J[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(5 players)</font>
SB checks, BB checks, <font color="#CC3333">Hero bets</font>, MP2 calls, CO calls, SB calls, BB calls.

Sweet. Top pair good kicker but two flush on the board. Autobet.
Turn: (8 BB) 6[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(5 players)</font>
SB checks, BB checks, <font color="#CC3333">Hero bets</font>, MP2 calls, CO calls, SB calls, BB folds.

This card didn't help anyone so autobet.

River: (12 BB) 6[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(4 players)</font>
SB checks, Hero checks, MP2 checks, CO checks.

Why were they calling down? On a draw of some sorts? Checked in case of a flush (SB had check raised rivers before) or someone had a 6.

Final Pot: 12 BB