I can't sack in Superstar mode

[kidflash555]

I have made many Line Backers and i cant seem to get to the QB fast enough in order to sack him besides the fact that its almost impossible to get passed the O-line. What attributes should I put have and to what number should i put them because the game doesn't do a great job describing the attributes. Do any of you have successful Line Backers in Superstar mode. Sorry, I'm new to Madden 10 and i haven't played in years. Thnx in advance!

[shigogouhou]

I got one sack in 2 preseason games at ROLB with the Chiefs; 85 speed and a lucky guess on a playaction pass got it for me.