New cnc user software issues.

HI,

i need some help setting up my new cnc machine.i have a cnc 6040z machine (usb cnc controller) and have cut2d desktop softwareI create the CAD and set up the tool path, but when i input the gcode into the controller the cnc is cutting the design around 1/3 (one third) to small?i.e i design a 300mm / 300mm box and when it cuts out on the cnc its cutting out approx 200mm / 200mm?

Please help.

I did not find the right solution from the internet.

References:
http://forum.vectric.com/viewtopic.php?f=18&t=26695
Motion graphics video animation service

Thanks!

Did U check if there is proper value of steps per milimeter value? Maybe it is set not corresponding to microstep vlue.
Or maybe there is linear scale factor set.
Do the values in G-code correspond to expected values or they are smaller?