50NL AK flop A63 rainbow, meeting resistance

Please critique my play, no reads on villain

***** Hand History for Game 3025139993 *****
$50 NL Texas Hold'em - Saturday, November 12, 15:17:53 EDT 2005
Table Table 64723 (No DP) (Real Money)
Seat 4 is the button
Total number of players : 10
Seat 1: WRChamp1 ( $49.75 )
Seat 2: blaidan2 ( $49.05 )
Seat 4: ara007 ( $159.25 )
Seat 5: nate_dawgg1 ( $9.45 )
Seat 7: bb9691 ( $51.60 )
Seat 9: Keyze ( $61.55 )
Seat 10: H_Seldon ( $54.05 )
Seat 8: GeorgeOrwell ( $46.40 )
Seat 6: HERO ( $50 )
Seat 3: CARIOCA171 ( $52.20 )
nate_dawgg1 posts small blind [$0.25].
DctrFunk posts big blind [$0.50].
** Dealing down cards **
Dealt to HERO [ Ac Kd ]
bb9691 folds.
GeorgeOrwell calls [$0.50].
Keyze folds.
H_Seldon calls [$0.50].
WRChamp1 folds.
blaidan2 folds.
CARIOCA171 calls [$0.50].
ara007 folds.
nate_dawgg1 folds.
DctrFunk raises [$1.50].
GeorgeOrwell calls [$1.50].
H_Seldon calls [$1.50].
CARIOCA171 calls [$1.50].
** Dealing Flop ** [ As, 6h, 3d ]
HERO bets [$2].
GeorgeOrwell raises [$4].
H_Seldon folds.
CARIOCA171 folds.
HERO calls [$2].
** Dealing Turn ** [ 3c ]
HERO checks.
GeorgeOrwell bets [$6].
HERO raises [$15].
GeorgeOrwell is all-In [$34.40]
HERO?