Overcard whiff, basic question

[Spleen]

Cryptologic
Limit Holdem Ring game
Limit: $0.35/$0.7
5 players
Converter

Stack sizes:
UTG: $35.30
CO: $27.58
Button: $28.80
SB: $27.09
Hero: $26.05

Pre-flop: (5 players) Hero is BB with K[img]/images/graemlins/club.gif[/img] J[img]/images/graemlins/club.gif[/img]
UTG folds, CO calls, Button calls, SB calls, <font color="#cc0000">Hero raises</font>, CO calls, Button calls, SB calls.

Flop: 3[img]/images/graemlins/diamond.gif[/img] 5[img]/images/graemlins/diamond.gif[/img] 2[img]/images/graemlins/club.gif[/img] (4SB, 4 players)
SB checks, Hero checks, <font color="#cc0000">CO bets</font>, Button calls, SB folds, Hero folds.

I raised here for value because the villians were playing anything. I let it go on the flop cause I was sure I was behind SOMEONE at that time. Is this standard play? Or am I missing something?