Never fold KK preflop, right?!?!?

[jlkrusty]

PokerStars No-Limit Hold'em, $6 BB (5 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

MP ($482)
Hero ($719)
SB ($609)
BB ($684)
UTG ($199.50)

Preflop: Hero is Button with K[img]/images/graemlins/heart.gif[/img], K[img]/images/graemlins/club.gif[/img].
<font color="#666666">1 fold</font>, <font color="#CC3333">MP raises to $18</font>, <font color="#CC3333">Hero raises to $58</font>, <font color="#CC3333">SB raises to $192</font>, <font color="#666666">1 fold</font>, <font color="#CC3333">MP raises to $482</font>, Hero???

Here's what I've observed about my opponents:

MP: A solid TAG player who seemed to play smart. I don't remember him getting grossly out of line. After 141 hands, I had his stats at 23/16 (with a post flop aggression factor of 3.3).

SB: Tight and very aggressive player capable of making moves. After 305 hands, I had his stats at 24/19 (with a post flop aggression factor of 5.2).

So, what do I do? Never fold KK preflop, right?