No Limit Problem

[rtucker5]

I was playing in a tournament at Party yesterday when the following hand occurred. There were about 100 players remaining and the top 70 made the money. My stack was slightly above average.

The blinds were T300/T600. I had about T9000. A player in middle position that had me covered limped and I raised to T2100 from the CO with AQo. Folded back to him and he called. The flop was J 10 x with 2 spades. I had no spades. He checked and I bet T2100 again. He flat called again. Turn was an offsuit brick and we both checked. River was a small spade. He bet T3000 into me and I mucked. Comments on all streets appreciated. I am having trouble in the middle stages of tournaments and this hand is a perfect example. I never know how to play the hand when I whiff the flop.