MAYA -My human obj model won't bind to skeleton

Okay, i have a human obj model made, and I've recently created a skeleton in AUTODESK MAYA to rig it. When I try attaching the skeleton to the biped using "Smooth Bind", the human mesh still doesn't even budge; it stays in its default T-Pose. I know I can't attach any files here, to offer a better understanding as to what I'm talking about but, please, what is going on?

Thanks.