Not sure what it's supposed to be. And I don't use LazyCAM.
But here's a few reasons why you're having problems.
1) The .dxf only contains a single block. Try exploding it.
2) anything that's not an arc is a 3D polyline, which I'm not sure if LC supports? Rich?
3) there are almost 20,000 lines and arcs. I can't see how anything recognizable could be cut from this??
It looks like an attempt to use a Raster to Vector converter on a photo of a landscape??