dont make moves on unmoveables

ok .. i ran goot up till this point but this hand to me is a headscratcher: Ok i know ur supposed to avoid conflict with fellow big stacks , but from my notes i have him as a weak tight player. His bet on the flop is weak and i have him pretty much where he is. I pick a number (raise) that shld tell him im commiting to this pot and he ignores that and pushes anyway : (54% to 46 fav, and even if he has overpair (not aa) iam 46%) .

feedback appreciated


Full Tilt Poker Game #2358750157: $14,000 Guarantee (17406595), Table 37 - 500/1000 Ante 125 - No Limit Hold'em - 16:50:43 ET - 2007/05/05
Seat 1: vrtra (15,223)
Seat 2: EAGLENUTTS (10,265)
Seat 3: OSU1987 (31,195)
Seat 4: AlisoDuke (37,740)
Seat 5: 10by2 (32,151)
Seat 6: duke stillsucks (55,202)
Seat 7: Speltey (3,568)
Seat 8: ADOUBLEEAGLE (28,891)
Seat 9: nana9372 (44,385)
vrtra antes 125
EAGLENUTTS antes 125
OSU1987 antes 125
AlisoDuke antes 125
10by2 antes 125
duke stillsucks antes 125
Speltey antes 125
ADOUBLEEAGLE antes 125
nana9372 antes 125
Speltey posts the small blind of 500
ADOUBLEEAGLE posts the big blind of 1,000
The button is in seat #6
*** HOLE CARDS ***
Dealt to duke stillsucks [Tc Ac]
nana9372 folds
vrtra folds
EAGLENUTTS folds
OSU1987 raises to 4,000
AlisoDuke folds
10by2 folds
duke stillsucks calls 4,000
Speltey folds
ADOUBLEEAGLE folds
*** FLOP *** [5d 9c 2c]
OSU1987 bets 5,000
duke stillsucks raises to 13,400
OSU1987 raises to 27,070, and is all in
duke stillsucks calls 13,670
AlisoDuke: uh oh
OSU1987 shows [6c 6h]
duke stillsucks shows [Tc Ac]
*** TURN *** [5d 9c 2c] [Qh]
*** RIVER *** [5d 9c 2c Qh] [5s]
OSU1987 shows two pair, Sixes and Fives