Plan on this flop

[Roy6]

UTG is 83/45, but not psycho, CO is 54/4 with AF~1

What's my plan for this hand? No donkinng?
The way I played it I think it's a clear fold. CO coldcalling raise and raising this bord is scary. I think most of the times he at least has a higher PP.

Party Poker 3/6 Hold'em (6 max, 6 handed) converter

Preflop: Hero is BB with 6[img]/images/graemlins/spade.gif[/img], K[img]/images/graemlins/spade.gif[/img].
<font color="#CC3333">UTG raises</font>, <font color="#666666">1 fold</font>, CO calls, <font color="#666666">2 folds</font>, Hero calls.

Flop: (6.33 SB) A[img]/images/graemlins/heart.gif[/img], A[img]/images/graemlins/club.gif[/img], 6[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(3 players)</font>
<font color="#CC3333">Hero bets</font>, UTG folds, <font color="#CC3333">CO raises</font>, Hero folds.

Final Pot: 4.66 BB

[Roy6]

bump. I'm lost here.

[Rudis]

It's a rough situation...
I don't usually lead here. I let the 85/45 bet. Then decide on call or raise depending on the third guy´s action...No one is going to give you credit for the ace, and usually no one will fold for the bet...