How to play this flush draw?

[Beck]

Bodog 30+3 Blinds 50/100

SB 1050
BB (hero) 1555 - is dealt /images/graemlins/diamond.gifJ /images/graemlins/diamond.gifK
UTG 2340
UTG1 515
MP 1675
CO 1140
BUT 1725

3 folds, CO raise to 200, BUT calls, SB folds, Hero calls

Was calling PF a mistake?

Flop (pot 650)
/images/graemlins/diamond.gif3 /images/graemlins/diamond.gifT /images/graemlins/heart.gif6

Hero checks, CO bet 420, BUT calls, hero????

DO I just let it go? Should I have led out the flop?

[tigerite]

I would think you should fold preflop, meh, I dunno. Once in this position, I dunno, probably shove or something.