Hey Guys, i have a problem with the raytracer, anyone can help?

Hey Guys! I’ve got some trouble with the raytracing. I’ve been working in a level where I’ve to simulate a light ray bouncing in a tunnel, right now I can make the tracer draw me 5 traces, but in the sixt collision It won’t collide with the tunnel and I really don’t know what to do.
Any ideas?

Thanks