Draw 3D line on landscape

[naruto]

i want to to draw 3d line on landscape , but i have a path
there is many nodes until the actor reach to the destination
how can i get 3d line between nodes

i use this on

Code:

ScreenTV.Draw_Line3D(Path.GetNode(8).x, CurrentPosNode.y, Path.GetNode(8).z,

Path.GetNode(7).x, CurrentPosNode.y, Path.GetNode(7).z,

 globals.RGBA(0f, 1f, 0f, 1f), globals.RGBA(0f, 1f, 0f, 1f));

but i have error and project not work ..
any help ??