I've beeen having this problem a lot since starting to check turns to control pots with TPTK hands. This is a bluff as much as a nut hand and it's always a guess for me. These guys don't see the turn check as a control move as much as weekness and hammer the turn thinking you'll weak tight the river and fold up. Even when I try check raising more often, it seems to go unnoticed and they still see the check as weak.