Flopped Butt-OE and Flush draw, How should this be played?

[jumo1007]

Poker Stars - No Limit Hold'em Cash Game - $0.10/$0.25 Blinds - 6 Players - (LegoPoker HH Converter)

SB: $24.10
BB: $25.00
UTG: $23.50
MP: $21.75
CO: $24.65
<font color="black">Hero (BTN): $37.75</font>

<font color="black">Preflop:</font> Hero is dealt 5[img]/images/graemlins/diamond.gif[/img] 4[img]/images/graemlins/diamond.gif[/img] (6 Players)
3 folds, <font color="red">Hero raises to $1.00</font>, SB folds, BB calls $0.75

<font color="black">Flop:</font> ($2.10) Q[img]/images/graemlins/diamond.gif[/img] 6[img]/images/graemlins/diamond.gif[/img] 7[img]/images/graemlins/spade.gif[/img] (2 Players)
BB checks, <font color="red">Hero bets $1.50</font>, <font color="red">BB raises to $4.50</font>, Hero calls $3.00

<font color="black">Turn:</font> ($11.10) Q[img]/images/graemlins/spade.gif[/img] (2 Players)
<font color="red">BB bets $6.00</font>, Hero times out

Pot Size: $17.10 ($0.55 Rake)