Civil 3D 2013. I am trying to create a pressure network with 1.8m cover. I haven't created one before but I've read up and understand how to do it. I have created a new network and referenced it to a surface and alignment, using the default parts catalog, and changed cover to 1.8m. I pick pipes and bends or pipes only and start to draw. It asked for an insertion point and I click one and a blue line, attached to my insertion point, follows my curser. It asked for another point and I click in another place but when I click that second point the blue line disappears and a new one follows my curser attached to the new point I just clicked. Nothing draws and I don't know what the issue is.