What did I do wrong?

PokerStars Game #3614271391: Hold'em No Limit ($0.10/$0.25) - 2006/01/12 - 16:19:47 (ET)
Table 'Asteria' Seat #5 is the button
Seat 1: vaks ($6.75 in chips)
Seat 2: antepop ($10.60 in chips)
Seat 3: diiixus ($20.40 in chips)
Seat 4: reeselb ($36.80 in chips)
Seat 5: LTrAiN187 ($29.05 in chips)
Seat 6: Diane Glin ($23.90 in chips)
Diane Glin: posts small blind $0.10
vaks: posts big blind $0.25
*** HOLE CARDS ***
Dealt to vaks [Kc Kd]
antepop: folds
diiixus: calls $0.25
reeselb: folds
LTrAiN187: raises $1 to $1.25
Diane Glin: folds
vaks: raises $1 to $2.25
diiixus: folds
LTrAiN187: calls $1
*** FLOP *** [9c Tc 3d]
vaks: checks
LTrAiN187: bets $4.50
vaks: calls $4.50 and is all-in
*** TURN *** [9c Tc 3d] [Ah]
*** RIVER *** [9c Tc 3d Ah] [As]
*** SHOW DOWN ***
vaks: shows [Kc Kd] (two pair, Aces and Kings)
LTrAiN187: shows [Ac Js] (three of a kind, Aces)
LTrAiN187 collected $13.20 from pot
vaks said, "wiow"
*** SUMMARY ***
Total pot $13.85 | Rake $0.65
Board [9c Tc 3d Ah As]
Seat 1: vaks (big blind) showed [Kc Kd] and lost with two pair, Aces and Kings
Seat 2: antepop folded before Flop (didn't bet)
Seat 3: diiixus folded before Flop
Seat 4: reeselb folded before Flop (didn't bet)
Seat 5: LTrAiN187 (button) showed [Ac Js] and won ($13.20) with three of a kind, Aces
Seat 6: Diane Glin (small blind) folded before Flop

Should i have not checked after the flop and instead either bet aggressive or go ai?

1. playing short stacked.
2. minraising.

Yeah, you bought it for a fourth of the max buyin. The problem with doing this is you get absolutely no fold equity from anybody and your hands will often get cracked.

The pre-flop minimum raise is your second mistake. I don't know how much I can stress this, although it's less of a problem with such a shortstack, but never EVER raise somebody the minimum, ESPECIALLY pre-flop. Imagine for a second that you bought in for the maximum of $25. Somebody raises to $1 preflop and you raise him $1 more, let's also for the sake of this topic assume that we have equal stack sizes. Now that min-raise is usually a sign of strength from a weak player, not saying that you are, but people who make the move you just did are announcing to the table that they have a huge hand, and that anybody with a pocket pair can call for cheap, flop a set and take your stack. Now with not even 7 bucks to start the hand they don't have great implied odds to begin with, but that's not the point. Raise bigger preflop and always bet that flop. In this case you induced a bluff and just got unlucky, but you really made several mistakes that ended up costing you the hand.