Lines3D.hitTestObject

I have a Lines3D, with only one line, and a couple Plane objects on the scene. I want to check if the line intersects with one of the planes.

It seems like Lines3D.hitTestObject returns true all the time, even if it's not touching anything. I believe it is because the bounding sphere of the line is huge.

What would be the best way to check if a line intersects with a DO3D ?

Thanks,

M-A