Flopped straight and flush draw: serious failure to extract

Party Poker No-Limit Hold'em, $0.50 BB (9 handed) converter (http://www.selachian.com/tools/bisonconverter/hhconverter.cgi)

I needed to win more on this hand, obviously. Suggestions? Raising the flop is obvious. Was that my only chance?

UTG+1 ($23.90)
MP1 ($45.85)
Hero ($34.15)
MP3 ($43.25)
CO ($61.37)
Button ($48.40)
SB ($33.85)
BB ($50)
UTG ($51.30)

Preflop: Hero is MP2 with 8/images/graemlins/spade.gif, 7/images/graemlins/spade.gif. SB posts a blind of $0.25.
<font color="#CC3333">UTG raises to $2</font>, <font color="#666666">2 folds</font>, Hero calls $2, <font color="#666666">5 folds</font>.

Flop: ($4.75) 4/images/graemlins/spade.gif, 5/images/graemlins/heart.gif, 6/images/graemlins/spade.gif <font color="#0000FF">(2 players)</font>
<font color="#CC3333">UTG bets $3</font>, Hero calls $3.

Turn: ($10.75) A/images/graemlins/club.gif <font color="#0000FF">(2 players)</font>
UTG checks, <font color="#CC3333">Hero bets $5</font>, UTG calls $5.

River: ($20.75) 7/images/graemlins/diamond.gif <font color="#0000FF">(2 players)</font>
UTG checks, <font color="#CC3333">Hero bets $10</font>, UTG folds.

Final Pot: $30.75

[yvesaint]

Raise flop, other than that, there's not much you can really do. The A didn't hit him, he probably has something like 99-JJ that just got scared of both the A and the 4-straight on the board. Sometimes no one just has anything worth playing back at you with.

[ajmargarine]

Well, you know this but....raising the flop some amount, any reasonable amount, makes a bigger pot for the turn, so your half-pot bet there will be larger. Doesn't look like he had much anyway with his turn-check.