nl200: no idea how to play my aces :(

[memento_mori]

Full Tilt Poker, $1/$2 NL Hold'em Cash Game, 5 Players
LegoPoker Hand History Converter

BB: $203
UTG: $178.90
CO: $201.55
BTN: $190
Hero (SB): $212

Pre-Flop: A[img]/images/graemlins/diamond.gif[/img] A[img]/images/graemlins/club.gif[/img] A[img]/images/graemlins/diamond.gif[/img] A[img]/images/graemlins/club.gif[/img] dealt to Hero (SB)
UTG folds, <font color="red">CO raises to $7</font>, BTN folds, <font color="red">Hero raises to $27</font>, BB folds, CO calls $20

Flop: ($56) 6[img]/images/graemlins/heart.gif[/img] K[img]/images/graemlins/diamond.gif[/img] K[img]/images/graemlins/club.gif[/img] (2 Players)
Hero checks, CO checks

Turn: ($56) 9[img]/images/graemlins/spade.gif[/img] (2 Players)
Hero checks, <font color="red">CO bets $36</font>, Hero calls $36

River: ($128) T[img]/images/graemlins/club.gif[/img] (2 Players)
Hero checks, <font color="red">CO bets $108</font>, Hero calls $108

no reads, I think I need to be the agressor at SOME POINT, just can't figure out where. Thoughts on all streets would be great