Trophies don't work on NBA 2k11?

I have a good amount of ps3 games on disk and downloaded and all of Their trophies work fine but whenever I want to get trophies for 2k11 none show up like for example when I win the 3 point comtest the trophy won't show up I was told font play on simulation sliders and play 5 min. Quarters but still nothing happens... Is it the disk or what?