How to set a click Listener on BillboardGui or descent?

I have a BillboardGui, and a ImageButton as a child of the BillboardGui, I set a click listener, but it doesn't work, this is an example of the click listener that I try to use:

billboard.ImgMaterials.MouseButton1Click:Connect(function() print("click") end)
billboard.ImgMaterials.MouseButton1Up:Connect(function() print("clickUp") end)
billboard.ImgMaterials.MouseButton1Down:Connect(function() print("clickDown") end)
billboard.ImgMaterials.MouseEnter:Connect(function() print("clickEnter") end)
billboard.ImgMaterials.MouseLeave:Connect(function() print("clickLeave") end)
billboard.ImgMaterials.MouseMoved:Connect(function()  print("clickMove") end)

Any help will be appreciated