Semibluffing calling stations T9o HU .25/.50

[HouseCalls]

So like I said I'm making the jump to 6-max and trying to learn appropriate aggression levels. All the shorthanded books talk a lot about being more aggressive with draws and with overs etc. Unfortunately I think I'm overdoing it a bit. Here's an example:

The villain here is 44/2.9/1 after 77 hands most of which were 6 handed; the table has now dropped to 3 players but he has not seemed to adjust his game.

Full Tilt Poker $0.25/$0.50 Limit Hold'em - 3 players
Hand Converter Tool from DeucesCracked.com

Preflop: Hero is BB with 9[img]/images/graemlins/club.gif[/img], T[img]/images/graemlins/diamond.gif[/img]
Button folds, SB calls, Hero checks.

Flop: (2.00 SB) 3[img]/images/graemlins/club.gif[/img], Q[img]/images/graemlins/diamond.gif[/img], 8[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
SB checks, <font color="#FF0000">Hero bets</font>, SB calls.

Turn: (2.00 BB) 5[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
SB checks, <font color="#FF0000">Hero bets</font>, SB calls.

River: (4.00 BB) A[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
SB checks, <font color="#FF0000">Hero bets</font>, SB calls.

Final Pot: 6.00 BB

Is betting the gutshot on the flop and semi bluffing the gutshot / flush draw on the turn too much against someone like this? Assuming it is, what stats are you looking at to decide when to start making plays like this?