Love to hear your input on this one Fnord.

FullTiltPoker Game #349659950: Table Washington - $0.25/$0.50 - No Limit Hold'em - 5:54:01 ET - 2005/12/23
Seat 1: zipzipzip ($31.80)
Seat 2: whatupsucka ($18)
Seat 3: Clint Baird ($20.15)
Seat 4: Intebarasnygg ($38.20)
Seat 5: scheme36 ($46.20)
Seat 6: Veritech Jedi ($45.10)
Seat 7: joshuaashtondzl ($60.45)
Seat 8: vw16v ($10)
Seat 9: DaveH000 ($48.90)
DaveH000 posts the small blind of $0.25
zipzipzip posts the big blind of $0.50
The button is in seat #7
*** HOLE CARDS ***
Dealt to joshuaashtondzl [Kd Kc]
whatupsucka folds
Clint Baird folds
Intebarasnygg folds
scheme36 folds
Veritech Jedi folds
joshuaashtondzl raises to $1.35
DaveH000 calls $1.10
zipzipzip calls $0.85
*** FLOP *** [2d 8d 5h]
vw16v stands up
DaveH000 checks
zipzipzip bets $0.50
joshuaashtondzl raises to $4.50
DaveH000 calls $4.50
zipzipzip folds
*** TURN *** [2d 8d 5h] [Jd]
DaveH000 checks
joshuaashtondzl checks
*** RIVER *** [2d 8d 5h Jd] [Ah]
DaveH000 bets $6.50
joshuaashtondzl: this sucks
joshuaashtondzl: but i gotta call ya
joshuaashtondzl calls $6.50
*** SHOW DOWN ***
DaveH000 shows [7d 9d] (a flush, Jack high)
joshuaashtondzl shows [Kd Kc] (a pair of Kings)
DaveH000 wins the pot ($25.25) with a flush, Jack high
joshuaashtondzl: nice hand bro
*** SUMMARY ***
Total pot $26.55 | Rake $1.30
Board: [2d 8d 5h Jd Ah]
Seat 1: zipzipzip (big blind) folded on the Flop
Seat 2: whatupsucka didn't bet (folded)
Seat 3: Clint Baird didn't bet (folded)
Seat 4: Intebarasnygg didn't bet (folded)
Seat 5: scheme36 didn't bet (folded)
Seat 6: Veritech Jedi didn't bet (folded)
Seat 7: joshuaashtondzl (button) showed [Kd Kc] and lost with a pair of Kings
Seat 8: vw16v is sitting out
Seat 9: DaveH000 (small blind) showed [7d 9d] and won ($25.25) with a flush, Jack high

Was betting a potish sized bet not good enough to stop the flush chase? I think I'm not being aggressive enough when I'm trying to stop flushies. I had a bad feeling he made the flush and at the river wanted a free showdown. I think even without putting him on the flush maybe I should of assumed I was beat? bahhh.. luck with kings lately wearing thin.