The ESP Guitar Company

Sorry for the noob question, Im not the greatist guitar tech, and seting up guitars could be expensive, so im trying to learn how to do it myself, so basically ive been reading things online and watching youtube videos on how to do it, and i got a rough idea...... I have a Usa Fender Lonestar Strat and no matter how high i lift the saddles IT ALWAYS BUZZES!!:mad: What am i doing wrong? thanks in advance