Why won't this tele work?

if string.byte(key) == 8 then
    if (Humanoid ~= nil) then
Humanoid:MoveTo(Torso.Position.x,Torso.Position.y, Torso.Position.z-10)
end

That is just the part that isn't working.

if string.byte(key) == 8 then

If the player presses "Backspace",

if (Humanoid ~= nil) then

Check if realplayer

Humanoid:MoveTo(Torso.Position.x,Torso.Position.y, Torso.Position.z-10)

Pushes them back(get it? Backspace?)

end

end.

Why won't this work?