Hi, Oskie
Your file has Arcs also, It's mostly that you haven't setup your Cut and Tool table settings.
Load your DXF, Clean, Optimize, Button's (Right Side).
Set "Cut", Info.Set, Rapid Hight, Cut Start, Cut Depth (Don't forget the Neg."-"), Set Layer, Set All Layers, Buttons.
Set "Tool", You'll need to Create and Update some Tools (This will give you your Feeds, Speeds and Cuts Per Pass Info.)
Give it a Try, Chip