Elitenino

Hello, I am new to tekkit and the forums and I need some help! I downloaded the technic launcher and I try to play on tekkit lite (friends play on that) and when I launch it, at the bottom right it says something about "FML is setting up your minecraft environment" and the bar is at 0% and then tekkit lite crashes. Can some1 tell me how to fix that "FML" thing so I can finally play D:? Thnks - Elite