semi bluff raise

[tassie]

SB: unknown, BB: 44%/5%. AF:3,
MP3: 23%/3% AF: 0.43

When I saw the raise I immediatly thought he was on a semi bluff raise with a flush or OESD. I thought there was a good chance I was ahead. The decision is to either reraise or fold. With an ugly board and four players to act behind I folded.

good decision or bad? And why?

Party Poker 2.00/4.00 Hold'em <font color="#0000FF">(10 handed)</font> link

Preflop: Hero is UTG with A[img]/images/graemlins/diamond.gif[/img], 9[img]/images/graemlins/diamond.gif[/img].
Hero calls, <font color="#666666">1 folds</font>, UTG+2 calls, <font color="#666666">2 folds</font>, MP3 calls, CO calls, <font color="#666666">1 folds</font>, SB completes, BB checks.

Flop: (6.00 SB) 9[img]/images/graemlins/club.gif[/img], 6[img]/images/graemlins/spade.gif[/img], 8[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(6 players)</font>
<font color="#CC3333">SB bets</font>, <font color="#CC3333">BB raises</font>, Hero folds, UTG+2 folds, MP3 calls, CO folds, SB calls.