KQ flops top pair -> chip leader pushes allin. Do I call?

[Malachii]

Hey guys, I'm a NL cash game player using my freeroll points. I have some history with the chip leader. He's pretty tight. About an orbit ago he raised from LP and I smooth called w/ QQ, looking to trap him postflop. Flop came 99x and he called my checkraise and then folded to my lead on the turn. I think he felt I was bluffing, but wasn't willing to play a big pot to find out. I have been playing very aggressively and basically running the table over, opening at least two pots a round. My table image is that of a LAG.

Edit: We're about 40 players out of the money, chip leader is the only one that has me covered at the table.

Party Poker No-Limit Hold'em (NL$0) <font color="#0000FF">(8 handed)</font> link

Preflop: Hero is BB with Q[img]/images/graemlins/heart.gif[/img], K[img]/images/graemlins/spade.gif[/img].
<font color="#666666">5 folds</font>, <font color="#CC3333">Button raises to $2200.00</font>, <font color="#666666">1 folds</font>, Hero calls $1400.00.

Flop: ($3600.00) 3[img]/images/graemlins/club.gif[/img], J[img]/images/graemlins/heart.gif[/img], Q[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets $3500.00</font>, <font color="#CC3333">Button raises all-in ($20347.00)</font>, <font color="#CC3333">Hero...