First Goddamn Hand

[MD2020]

PokerStars Game #3290354551: Tournament #16291366, Hold'em No Limit - Level I (10/20) - 2005/12/09 - 23:42:46 (ET)
Table '16291366 1' Seat #1 is the button

Hero is BB with A [img]/images/graemlins/spade.gif[/img] A [img]/images/graemlins/diamond.gif[/img]

4 folds, CO calls, Button raises to 100, SB folds, Hero raised to 420, CO folds, Button is all in, Hero calls.

Button has K [img]/images/graemlins/diamond.gif[/img] K [img]/images/graemlins/heart.gif[/img]

Flop is J [img]/images/graemlins/heart.gif[/img] 6 [img]/images/graemlins/heart.gif[/img] T [img]/images/graemlins/spade.gif[/img]
Turn is 9 [img]/images/graemlins/diamond.gif[/img]
River is K [img]/images/graemlins/club.gif[/img]


Other than not folding preflop, what mistakes did I make?