Why dont this work?
VCM = playSound3D("vcm.mp3", 837.90606689453, -2066.2963867188, 16.712882995605,true)
function OpenLogin()
local width, height = guiGetScreenSize()
local x,y,z = getElementPosition( getLocalPlayer ( ) )
local dim = getElementDimension( getLocalPlayer ( ) )
setElementDimension ( VCM, dim )
setElementPosition ( VCM, x,y,z )
setSoundVolume(VCM, 1)