$1/$2 with 99 and K on flop - need to be more aggressive or tighter?

[hammerva]

Poker Stars
Limit Holdem Ring game
Limit: $1/$2
9 players
Converter

Stack sizes:
UTG: $10
UTG+1: $55.50
MP1: $46.25
MP2: $33.50
MP3: $46.25
CO: $160.25
Hero: $41.50
SB: $89.75
BB: $74

Pre-flop: (9 players) Hero is Button with 9[img]/images/graemlins/spade.gif[/img] 9[img]/images/graemlins/club.gif[/img]
UTG calls, 5 folds, <font color="#cc0000">Hero raises</font>, SB calls, BB calls, UTG calls.

Flop: 4[img]/images/graemlins/heart.gif[/img] 2[img]/images/graemlins/club.gif[/img] K[img]/images/graemlins/spade.gif[/img] (8SB, 4 players)
SB checks, BB checks, UTG checks, <font color="#cc0000">Hero bets</font>, SB calls, BB folds, UTG calls.

Turn: 8[img]/images/graemlins/diamond.gif[/img] (5.5BB, 3 players)
SB checks, UTG checks, Hero checks.

River: T[img]/images/graemlins/spade.gif[/img] (5.5BB, 3 players)
SB checks, UTG checks, <font color="#cc0000">Hero ?? </font>

My play with 33 - 99 stinks. On this hand I am in late position so I would think a raise with 99 is the right play. If I can win the pot right there then good. Flop shows a K and now I don't know what to do. I bet to put off the image of a K (dumb move?) and two people call. Turn is kind of harmless but with 2 players someone could have a K. Should I have bet to semi bluff or check? River is pretty scary but nobody has shown any power on this hand. Should I play this weak or bite the bullet?

Thanks [img]/images/graemlins/frown.gif[/img]