I am trying to generate gcode to cut a 12" wide 12 sided polygon, but all I get is surfacing of a 12" square. What am I doing wrong?

I was going to put a screenshot here but can't figure out how to do it.

%
(A 3D Contour : Generated by SketchUcam V1.4b-8c2e)
(Bit Diameter: 1/8")
(StepOver: ~ 1/16" 70.0%)
(Spindle speed: 15000)
(FeedRate: 100")
(Material Thickness: 1/8")
(Safe Length: 30")
(Safe Width: 48")
(SafeHeight: 3")
(NOTE: Z zero is top of material)
G90 G20 G49
M3 S15000
G0 Z3.0000
X0.1536 Y0.6919
G1 Z-0.1250 F100
X0.1536 Y0.6919 Z-0.1250
X0.1536 Y12.7480 Z-0.1250
X0.2411 Y12.7480 Z-0.1250
X0.2411 Y0.6044 Z-0.1250
X0.3286 Y0.6044 Z-0.1250
X0.3286 Y12.7480 Z-0.1250
X0.4161 Y12.7480 Z-0.1250
X0.4161 Y0.6044 Z-0.1250
X0.5036 Y0.6044 Z-0.1250
X0.5036 Y12.7480 Z-0.1250
X0.5911 Y12.7480 Z-0.1250
X0.5911 Y0.6044 Z-0.1250
X0.6786 Y0.6044 Z-0.1250
X0.6786 Y12.7480 Z-0.1250
X0.7661 Y12.7480 Z-0.1250
X0.7661 Y0.6044 Z-0.1250
X0.8536 Y0.6044 Z-0.1250
X0.8536 Y12.7480 Z-0.1250
X0.9411 Y12.7480 Z-0.1250
X0.9411 Y0.6044 Z-0.1250
X1.0286 Y0.6044 Z-0.1250
X1.0286 Y12.7480 Z-0.1250
X1.1161 Y12.7480 Z-0.1250
X1.1161 Y0.6044 Z-0.1250
X1.2036 Y0.6044 Z-0.1250
X1.2036 Y12.7480 Z-0.1250
X1.2911 Y12.7480 Z-0.1250
X1.2911 Y0.6044 Z-0.1250
X1.3786 Y0.6044 Z-0.1250
X1.3786 Y12.7480 Z-0.1250
X1.4661 Y12.7480 Z-0.1250
X1.4661 Y0.6044 Z-0.1250
X1.5536 Y0.6044 Z-0.1250
X1.5536 Y12.7480 Z-0.1250
X1.6411 Y12.7480 Z-0.1250
X1.6411 Y0.6044 Z-0.1250
X1.7286 Y0.6044 Z-0.1250
X1.7286 Y12.7480 Z-0.1250
X1.8161 Y12.7480 Z-0.1250
X1.8161 Y0.6044 Z-0.1250
X1.9036 Y0.6044 Z-0.1250
X1.9036 Y12.7480 Z-0.1250
X1.9911 Y12.7480 Z-0.1250
X1.9911 Y0.6044 Z-0.1250
X2.0786 Y0.6044 Z-0.1250
X2.0786 Y12.7480 Z-0.1250
X2.1661 Y12.7480 Z-0.1250
X2.1661 Y0.6044 Z-0.1250
X2.2536 Y0.6044 Z-0.1250
X2.2536 Y12.7480 Z-0.1250
X2.3411 Y12.7480 Z-0.1250
X2.3411 Y0.6044 Z-0.1250
X2.4286 Y0.6044 Z-0.1250
X2.4286 Y12.7480 Z-0.1250
X2.5161 Y12.7480 Z-0.1250
X2.5161 Y0.6044 Z-0.1250
X2.6036 Y0.6044 Z-0.1250
X2.6036 Y12.7480 Z-0.1250
X2.6911 Y12.7480 Z-0.1250
X2.6911 Y0.6044 Z-0.1250
X2.7786 Y0.6044 Z-0.1250
X2.7786 Y12.7480 Z-0.1250
X2.8661 Y12.7480 Z-0.1250
X2.8661 Y0.6044 Z-0.1250
X2.9536 Y0.6044 Z-0.1250
X2.9536 Y12.7480 Z-0.1250
X3.0411 Y12.7480 Z-0.1250
X3.0411 Y0.6044 Z-0.1250
X3.1286 Y0.6044 Z-0.1250
X3.1286 Y12.7480 Z-0.1250
X3.2161 Y12.7480 Z-0.1250
X3.2161 Y0.6044 Z-0.1250
X3.3036 Y0.6044 Z-0.1250
X3.3036 Y12.7480 Z-0.1250
X3.3911 Y12.7480 Z-0.1250
X3.3911 Y0.6044 Z-0.1250
X3.4786 Y0.6044 Z-0.1250
X3.4786 Y12.7480 Z-0.1250
X3.5661 Y12.7480 Z-0.1250
X3.5661 Y0.6044 Z-0.1250
X3.6536 Y0.6044 Z-0.1250
X3.6536 Y12.7480 Z-0.1250
X3.7411 Y12.7480 Z-0.1250
X3.7411 Y0.6044 Z-0.1250
X3.8286 Y0.6044 Z-0.1250
X3.8286 Y12.7480 Z-0.1250
X3.9161 Y12.7480 Z-0.1250
X3.9161 Y0.6044 Z-0.1250
X4.0036 Y0.6044 Z-0.1250
X4.0036 Y12.7480 Z-0.1250
X4.0911 Y12.7480 Z-0.1250
X4.0911 Y0.6044 Z-0.1250
X4.1786 Y0.6044 Z-0.1250
X4.1786 Y12.7480 Z-0.1250
X4.2661 Y12.7480 Z-0.1250
X4.2661 Y0.6044 Z-0.1250
X4.3536 Y0.6044 Z-0.1250
X4.3536 Y12.7480 Z-0.1250
X4.4411 Y12.7480 Z-0.1250
X4.4411 Y0.6044 Z-0.1250
X4.5286 Y0.6044 Z-0.1250
X4.5286 Y12.7480 Z-0.1250
X4.6161 Y12.7480 Z-0.1250
X4.6161 Y0.6044 Z-0.1250
X4.7036 Y0.6044 Z-0.1250
X4.7036 Y12.7480 Z-0.1250
X4.7911 Y12.7480 Z-0.1250
X4.7911 Y0.6044 Z-0.1250
X4.8786 Y0.6044 Z-0.1250
X4.8786 Y12.7480 Z-0.1250
X4.9661 Y12.7480 Z-0.1250
X4.9661 Y0.6044 Z-0.1250
X5.0536 Y0.6044 Z-0.1250
X5.0536 Y12.7480 Z-0.1250
X5.1411 Y12.7480 Z-0.1250
X5.1411 Y0.6044 Z-0.1250
X5.2286 Y0.6044 Z-0.1250
X5.2286 Y12.7480 Z-0.1250
X5.3161 Y12.7480 Z-0.1250
X5.3161 Y0.6044 Z-0.1250
X5.4036 Y0.6044 Z-0.1250
X5.4036 Y12.7480 Z-0.1250
X5.4911 Y12.7480 Z-0.1250
X5.4911 Y0.6044 Z-0.1250
X5.5786 Y0.6044 Z-0.1250
X5.5786 Y12.7480 Z-0.1250
X5.6661 Y12.7480 Z-0.1250
X5.6661 Y0.6044 Z-0.1250
X5.7536 Y0.6044 Z-0.1250
X5.7536 Y12.7480 Z-0.1250
X5.8411 Y12.7480 Z-0.1250
X5.8411 Y0.6044 Z-0.1250
X5.9286 Y0.6044 Z-0.1250
X5.9286 Y12.7480 Z-0.1250
X6.0161 Y12.7480 Z-0.1250
X6.0161 Y0.6044 Z-0.1250
X6.1036 Y0.6044 Z-0.1250
X6.1036 Y12.7480 Z-0.1250
X6.1911 Y12.7480 Z-0.1250
X6.1911 Y0.6044 Z-0.1250
X6.2786 Y0.6044 Z-0.1250
X6.2786 Y12.7480 Z-0.1250
X6.3661 Y12.7480 Z-0.1250
X6.3661 Y0.6044 Z-0.1250
X6.4536 Y0.6044 Z-0.1250
X6.4536 Y12.7480 Z-0.1250
X6.5411 Y12.7480 Z-0.1250
X6.5411 Y0.6044 Z-0.1250
X6.6286 Y0.6044 Z-0.1250
X6.6286 Y12.7480 Z-0.1250
X6.7161 Y12.7480 Z-0.1250
X6.7161 Y0.6044 Z-0.1250
X6.8036 Y0.6044 Z-0.1250
X6.8036 Y12.7480 Z-0.1250
X6.8911 Y12.7480 Z-0.1250
X6.8911 Y0.6044 Z-0.1250
X6.9786 Y0.6044 Z-0.1250
X6.9786 Y12.7480 Z-0.1250
X7.0661 Y12.7480 Z-0.1250
X7.0661 Y0.6044 Z-0.1250
X7.1536 Y0.6044 Z-0.1250
X7.1536 Y12.7480 Z-0.1250
X7.2411 Y12.7480 Z-0.1250
X7.2411 Y0.6044 Z-0.1250
X7.3286 Y0.6044 Z-0.1250
X7.3286 Y12.7480 Z-0.1250
X7.4161 Y12.7480 Z-0.1250
X7.4161 Y0.6044 Z-0.1250
X7.5036 Y0.6044 Z-0.1250
X7.5036 Y12.7480 Z-0.1250
X7.5911 Y12.7480 Z-0.1250
X7.5911 Y0.6044 Z-0.1250
X7.6786 Y0.6044 Z-0.1250
X7.6786 Y12.7480 Z-0.1250
X7.7661 Y12.7480 Z-0.1250
X7.7661 Y0.6044 Z-0.1250
X7.8536 Y0.6044 Z-0.1250
X7.8536 Y12.7480 Z-0.1250
X7.9411 Y12.7480 Z-0.1250
X7.9411 Y0.6044 Z-0.1250
X8.0286 Y0.6044 Z-0.1250
X8.0286 Y12.7480 Z-0.1250
X8.1161 Y12.7480 Z-0.1250
X8.1161 Y0.6044 Z-0.1250
X8.2036 Y0.6044 Z-0.1250
X8.2036 Y12.7480 Z-0.1250
X8.2911 Y12.7480 Z-0.1250
X8.2911 Y0.6044 Z-0.1250
X8.3786 Y0.6044 Z-0.1250
X8.3786 Y12.7480 Z-0.1250
X8.4661 Y12.7480 Z-0.1250
X8.4661 Y0.6044 Z-0.1250
X8.5536 Y0.6044 Z-0.1250
X8.5536 Y12.7480 Z-0.1250
X8.6411 Y12.7480 Z-0.1250
X8.6411 Y0.6044 Z-0.1250
X8.7286 Y0.6044 Z-0.1250
X8.7286 Y12.7480 Z-0.1250
X8.8161 Y12.7480 Z-0.1250
X8.8161 Y0.6044 Z-0.1250
X8.9036 Y0.6044 Z-0.1250
X8.9036 Y12.7480 Z-0.1250
X8.9911 Y12.7480 Z-0.1250
X8.9911 Y0.6044 Z-0.1250
X9.0786 Y0.6044 Z-0.1250
X9.0786 Y12.7480 Z-0.1250
X9.1661 Y12.7480 Z-0.1250
X9.1661 Y0.6044 Z-0.1250
X9.2536 Y0.6044 Z-0.1250
X9.2536 Y12.7480 Z-0.1250
X9.3411 Y12.7480 Z-0.1250
X9.3411 Y0.6044 Z-0.1250
X9.4286 Y0.6044 Z-0.1250
X9.4286 Y12.7480 Z-0.1250
X9.5161 Y12.7480 Z-0.1250
X9.5161 Y0.6044 Z-0.1250
X9.6036 Y0.6044 Z-0.1250
X9.6036 Y12.7480 Z-0.1250
X9.6911 Y12.7480 Z-0.1250
X9.6911 Y0.6044 Z-0.1250
X9.7786 Y0.6044 Z-0.1250
X9.7786 Y12.7480 Z-0.1250
X9.8661 Y12.7480 Z-0.1250
X9.8661 Y0.6044 Z-0.1250
X9.9536 Y0.6044 Z-0.1250
X9.9536 Y12.7480 Z-0.1250
X10.0411 Y12.7480 Z-0.1250
X10.0411 Y0.6044 Z-0.1250
X10.1286 Y0.6044 Z-0.1250
X10.1286 Y12.7480 Z-0.1250
X10.2161 Y12.7480 Z-0.1250
X10.2161 Y0.6044 Z-0.1250
X10.3036 Y0.6044 Z-0.1250
X10.3036 Y12.7480 Z-0.1250
X10.3911 Y12.7480 Z-0.1250
X10.3911 Y0.6044 Z-0.1250
X10.4786 Y0.6044 Z-0.1250
X10.4786 Y12.7480 Z-0.1250
X10.5661 Y12.7480 Z-0.1250
X10.5661 Y0.6044 Z-0.1250
X10.6536 Y0.6044 Z-0.1250
X10.6536 Y12.7480 Z-0.1250
X10.7411 Y12.7480 Z-0.1250
X10.7411 Y0.6044 Z-0.1250
X10.8286 Y0.6044 Z-0.1250
X10.8286 Y12.7480 Z-0.1250
X10.9161 Y12.7480 Z-0.1250
X10.9161 Y0.6044 Z-0.1250
X11.0036 Y0.6044 Z-0.1250
X11.0036 Y12.7480 Z-0.1250
X11.0911 Y12.7480 Z-0.1250
X11.0911 Y0.6044 Z-0.1250
X11.1786 Y0.6044 Z-0.1250
X11.1786 Y12.7480 Z-0.1250
X11.2661 Y12.7480 Z-0.1250
X11.2661 Y0.6044 Z-0.1250
X11.3536 Y0.6044 Z-0.1250
X11.3536 Y12.7480 Z-0.1250
X11.4411 Y12.7480 Z-0.1250
X11.4411 Y0.6044 Z-0.1250
X11.5286 Y0.6044 Z-0.1250
X11.5286 Y12.7480 Z-0.1250
X11.6161 Y12.7480 Z-0.1250
X11.6161 Y0.6044 Z-0.1250
X11.7036 Y0.6044 Z-0.1250
X11.7036 Y12.7480 Z-0.1250
X11.7911 Y12.7480 Z-0.1250
X11.7911 Y0.6044 Z-0.1250
X11.8786 Y0.6044 Z-0.1250
X11.8786 Y12.7480 Z-0.1250
X11.9661 Y12.7480 Z-0.1250
X11.9661 Y0.6044 Z-0.1250
X12.0536 Y0.6044 Z-0.1250
X12.0536 Y12.7480 Z-0.1250
M05
G0 Z3.0000
G0 X0 Y0
M30
%

 

Unchecked "Generate 3D code" in parameters and fixed the problem.

%
(Generated by SketchUcam V1.4b-8c2e)
(Bit diameter: 1/8")
(Feed rate: 100"/min)
(Material Thickness: 1/8")
(Material length: 48" X width: 30")
(Overhead Gantry: true)
(Plunge Depth first)
(Using plain toolchange)
(Optimization is ON)
(www.PhlatBoyz.com)
G90 G20 G49 G17 F100
T1 M06
M3 S15000
G00 Z3.0
X3.1895 Y1.4179
G00 Z0.020
G01 Z-0.1375 F100
X6.2254 Y0.6044
X9.2613 Y1.4179
X11.4838 Y3.6403
X12.2972 Y6.6762
X11.4838 Y9.7121
X9.2613 Y11.9346
X6.2254 Y12.748
X3.1895 Y11.9346
X0.9671 Y9.7121
X0.1536 Y6.6762
X0.9671 Y3.6403
X3.1895 Y1.4179
G00 Z3.0
G00 X0 Y0 (home)
M05
M30
%