Your move and any comments on how I played the hand would be appreciated. Thank you.

POKERSTARS GAME #2350602549: HOLD'EM NO LIMIT ($1/$2) - 2005/08/16 - 05:54:53 (ET)
Table 'Peiraios II' Seat #5 is the button
Seat 2: andr3w321 ($193.20 in chips)
Seat 4: garyjr316 ($60 in chips)
Seat 5: hulsker ($146.10 in chips)
andr3w321: posts small blind $1
garyjr316: posts big blind $2
*** HOLE CARDS ***
Dealt to andr3w321 [:Ad: :Ac:]
hulsker: calls $2
leiningen joins the table at seat #3
andr3w321: raises $4 to $6
garyjr316: calls $4
hulsker: calls $4
*** FLOP *** [:Kd: ]
andr3w321: bets $12
garyjr316: folds
hulsker: calls $12
*** TURN *** [Kd 8h 4d] [:Td:]
andr3w321: bets $30
hulsker: calls $30
*** RIVER *** [Kd 8h 4d Td] []
andr3w321: bets $20
hulsker: raises $78.10 to $98.10 and is all-in
andr3w321...?