c/f flop

I often cbet KK on A high flop but in 3b pots I seem to struggle and get check raised a lot, so I have reduced cbet a lot in those spots, which I guess is bad.  yeah first hand was stupis and I almost always would cbet there.

O I dindth say previous hand  was talking about I had AKo.

Nobody thinks checking A high flop is ok?  I mean if he c/r flop we almost always fold.  I think if we check flop we ca sometimes gte to showdown (I think)?

Just got moved 6 hands ago already played decent sized pot Vs villain. Very first hand I get moved he opens full 3x to 21k I 3b to 48k (to small?) he flats. Flop is Q73r, he checks and for some dumb reason I check. Turn is 3. He bets really small like 1/10th pot i call. River is 5 no flush draws and he overbets pot I fold. So I guess he thinks I am a retard.

I thought checking flop is fine and calling turn and cant see anything else but to fold river. I guess Im thinking does our history have anything to do with it?

Also what do u think of sizing pre?

Poker Stars $3.00+$0.30 No Limit Hold'em Tournament - t4000/t8000 Blinds + t800 - 9 players - View hand 784435
The Official DeucesCracked.com Hand History Converter

MP2: t103141 M = 5.37
CO: t376279 M = 19.60
BTN: t341274 M = 17.77
SB: t783516 M = 40.81
Hero (BB): t390243 M = 20.33
UTG: t140749 M = 7.33
UTG+1: t714044 M = 37.19
UTG+2: t195408 M = 10.18
MP1: t599925 M = 31.25

Pre Flop: (t19200) Hero is BB with   
7 folds, SB raises to t16000, Hero raises to t44444, SB calls t28444

Flop: (t96088)      (2 players)
SB checks, Hero checks

Turn: (t96088)  (2 players)
SB bets t40000, Hero calls t40000

River: (t176088)  (2 players)
SB bets t200000, Hero