I am on Button, with two nits in the blinds.

SB is running 14/6 and folds BB to a raise 100% over 260 hands
BB is 11/5 and folds BB to raise 100% over 180 hands

Action is folded to me so I assume its a good opportunity to steal. Then with a call, I try and stab at the flop.

Full Tilt No-Limit Hold'em, $0.05 BB (9 handed) - Full Tilt Converter Tool from FlopTurnRiver.com

Hero (Button) ($4.02)
SB ($5)
BB ($5)
UTG ($5.85)
UTG+1 ($5.05)
MP1 ($5.53)
MP2 ($5.10)
MP3 ($3.58)
CO ($1.94)

Preflop: Hero is Button with 4, J
6 folds, Hero bets $0.15, SB calls $0.13, 1 fold

Flop: ($0.35) 7, 9, 6 (2 players)
SB checks, Hero bets $0.22, SB raises to $4.85 (All-In), Hero folds

Total pot: $0.79 | Rake: $0.05

Results:
SB didn't show
Outcome: SB won $0.74

Where did I go wrong? Was the flop too wet to bluff at? Should I have bet more preflop?