Failed to Fabricate a Functional Fiber Optic

Yeah, in the lab today, my fabricated fiber optic cable did NOT work. The there's no transmission of the infra red signal from the infra red torch. I probably crippled the fiber optic itself when I was doing the clamping. Hands were shaky :(
But it's pretty fun though, to make it from scratch. Yeah it's just as simple basic one but still, it's my first.