Stupid line?

[Poker_Ink]

3/6 6 max, 6 handed.
MP is passive, with a .5 rating. In this particular hand, I check raised the flop, with all intentions of check-raising the turn again and leading the river. I felt that if he has an A, he might figure me for a middle pair and I was putting him to the test, and when I check the turn, I show that that I am not as strong as I advertised. Furthermore, if he has, say, KK or QQ, he might think the same and again bet to put me on no A. Or, if he checks behind, I can bet out the river and get a call, where I might get a fold out of QQ or KK on the turn (he has shown the ability to drop an underpair, no matter how good, if running into resistance). Regardless, is this a stupid attempt? I felt that if he is betting, he also has some hand, as he is so passive.

I am BB with 6 [img]/images/graemlins/club.gif[/img]6 [img]/images/graemlins/heart.gif[/img]
UTG calls, MP raises, folded to me, I call, UTG calls.

FLOP IS: 6 [img]/images/graemlins/diamond.gif[/img]A [img]/images/graemlins/club.gif[/img]3 [img]/images/graemlins/heart.gif[/img]

I check, UTG checks, MP bets, I raise, UTG calls, MP calls.

TURN IS: 4 [img]/images/graemlins/spade.gif[/img]
<font color="red"> I check? </font>