Moving parts postion not working correctly?

local module = {}

function module.tweenpartpos (part,newx,newy,newz,partspeed)
	local newpos = Vector3.new(newx,newy,newz)
	local interval = .01
	local currentx = part.Position.X	
		local currenty = part.Position.Y
			local currentz = part.Position.Z
						   local intervalforx = newx - currentx

	for i = 1,intervalforx/.001,1 do
		part.Postion = part.Position + Vector3.new(.01,0,0)
	end		

end

return module

What i am after is making the part tween, on line 12 i am having an error the for i = 1,intervalforx,1 loop is for the x position of the part, how do i fix?