25NL: AKo Played Just Awful

[zooot]

Poker Stars - No Limit Hold'em Cash Game - $0.10/$0.25 Blinds - 6 Players - (LegoPoker HH Converter)

Hero (SB): $25.95
BB: $32.95
UTG: $25.35
MP: $7.40
CO: $46.15
BTN: $28.10

Preflop: Hero is dealt K[img]/images/graemlins/heart.gif[/img] A[img]/images/graemlins/club.gif[/img] (6 Players)
UTG folds, MP calls $0.25, CO folds, BTN calls $0.25, <font color="red">Hero raises to $1.50</font>, BB folds, MP calls $1.25, BTN calls $1.25

Flop: ($4.75) 5[img]/images/graemlins/club.gif[/img] 8[img]/images/graemlins/spade.gif[/img] 2[img]/images/graemlins/diamond.gif[/img] (3 Players)
<font color="red">Hero bets $4.00</font>, <font color="red">MP raises all-in to $5.90</font>, BTN calls $5.90, Hero calls $1.90

Turn: ($22.45) 5[img]/images/graemlins/club.gif[/img] 8[img]/images/graemlins/spade.gif[/img] 2[img]/images/graemlins/diamond.gif[/img] 3[img]/images/graemlins/diamond.gif[/img] (3 Players - 1 All-In)
Hero checks, BTN checks

River: ($22.45) 5[img]/images/graemlins/club.gif[/img] 8[img]/images/graemlins/spade.gif[/img] 2[img]/images/graemlins/diamond.gif[/img] 3[img]/images/graemlins/diamond.gif[/img] T[img]/images/graemlins/club.gif[/img] (3 Players - 1 All-In)
Hero checks, BTN checks

Pot Size: $22.45 ($1.10 Rake)

BTN is 61/0/0.42/59. This is just awful Hero play. Check/Fold Flop here? I do not often fire cbets into 2+ players but I guess I expected shortstack to come along light and BTN to fold w/out a hand or reraise w/ the goods.

Light me up plzzz. Thx