Hi, Terry
On your Settings Page, Bottom right, Units are thy in MM or INCH, To change click on UNITS Alt-U button and retry.
Or use MDi to reset Mach3 to Inch mode, enter G20 on MDi line.
Post your DXF and G-code file.
LazyCam deals in Units 1 can be, 1 inch or 1 mm, Mach3 determines how to treat them
Hope this Helps, Chip