Do I need more info? Bet earlier?

Should I consider that I might be beat?

Party Poker No-Limit Hold'em, $ BB (6 max, 6 handed) FTR converter on zerodivide.cx

MP ($28.65)
CO ($106.73)
Button ($24.55)
Hero ($19.55)
BB ($1.95)
UTG ($41.15)

Preflop: Hero is SB with A:club:, K:spade:. Hero posts a blind of $0.10.
1 fold, MP raises to $2, CO calls $2, 1 fold, Hero (poster) calls $1.90, Hero checks, MP checks, CO bets $2.75, Hero calls $0.75, MP raises to $2, CO folds, Hero calls $1.25.

Flop: ($7.10) 4:spade:, A:heart:, T:diamond: (3 players)

Turn: ($7.10) 6:spade: (3 players)
Hero checks, MP bets $3, Hero calls $3.

River: ($13.10) 6:club: (3 players)
MP calls $12.55.

Final Pot: $25.65
Main Pot: $25.65, between MP, Hero and BB.

I was trying to look like I was buying the pot with the last bet.

I don't understand this HH. Where are the turn and river moves?

Here it is unconverted:

#Game No : 2915504453
***** Hand History for Game 2915504453 *****
$25 NL Texas Hold'em - Sunday, January 29, 16:29:04 EDT 2006
Table Table 54775 (6 max) (No DP) (Real Money)
Seat 3 is the button
Total number of players : 6
Seat 1: mikhja_83 ( $28.65 )
Seat 6: jonsaboy ( $41.15 )
Seat 4: jtsuji1129 ( $19.55 )
Seat 2: Woopilolo ( $106.73 )
Seat 5: Corbhaile ( $1.95 )
Seat 3: scarlind ( $24.55 )
jtsuji1129 posts small blind [$0.10].
Corbhaile posts big blind [$0.25].
** Dealing down cards **
Dealt to jtsuji1129 [ Ac Ks ]
jonsaboy folds.
mikhja_83 raises [$2].
Woopilolo calls [$2].
scarlind folds.
jtsuji1129 calls [$1.90].
Corbhaile is all-In [$1.70]
** Dealing Flop ** [ 4s, Ah, Td ]
jtsuji1129 checks.
mikhja_83 checks.
Woopilolo bets [$0.75].
jtsuji1129 calls [$0.75].
mikhja_83 raises [$2].
Woopilolo folds.
jtsuji1129 calls [$1.25].
** Dealing Turn ** [ 6s ]
jtsuji1129 checks.
mikhja_83 bets [$3].
jtsuji1129 calls [$3].
** Dealing River ** [ 6c ]
jtsuji1129 is all-In [$12.55]
mikhja_83: ty
mikhja_83 calls [$12.55].
jtsuji1129 shows [ Ac, Ks ] two pairs, aces and sixes.
Corbhaile doesn't show [ 5d, 5h ] two pairs, sixes and fives.
mikhja_83 shows [ Ad, As ] a full house, Aces full of sixes.
mikhja_83 wins $34.20 from side pot #1 with a full house, Aces full of sixes.
mikhja_83 wins $7.45 from the main pot with a full house, Aces full of sixes.
jonsaboy has left the table.

mikhja_83's check raise on flop is very fishy and smells like a monster especially after pre flop raise.

I would suggest you raise on flop rather than just call but once you see the original raiser check raise GET OUT!!!!

Re-raise preflop to try to isolate this... Then bet or raise the flop to find out where you're at... This isn't really the spot to try and get sneaky, you have to find out where you're at by betting and raising.

I agree. I think you played the hand far too passively. You seem like you realize this in retrospect. Reraising PF would have caused Villian to possible Re-re-raise and you would gain vital information.

Post flop you should have opened and gotten his AA reaction.

I agree with what has already been stated...Reraise pre-flop. Find out if you are up against a monster. I probably would have raised on the flop as well for definition. You don't to run into a set at the end of this hand. Better to find out while it is cheaper.

Thanks for the replies guys. Looks like I just need to bet it out. Better to know I'm beat than put it all in then know I'm beat.