I am making a vector representation of the lightobject z table top for k40

I am making a vector representation of the lightobject z table top for k40 so I can make a jig to hold material down, align material for cutting, have a spoiler board, etc. The dimensions of the board are about 9 inches tall and 13.75 inches wide. I am using cohesion3d board with k40. I am a beginner but I have been able to make some other things previously with laserweb4. Anyway, I am getting an error, Start Height Must be a valid number. The original settings for the machine in laserweb4 were 300mm wide and 200mm tall. The outer diameter of the rectangle is about 350mm X 230mm. I changed the machine settings to 352X 232mm in laserweb4, still have the same error. Maybe it is simply too big to be able to cut with this machine?
Here is a link to the file:
https://drive.google.com/open?id=0ByPPiZOAFXdtSTNjOGU3UXFRM00

front end 4.0.735
back end 4.0.113

Settings :arrow_right: machine :arrow_right: enable/disable z stage.

You have z stage enabled, so start height is a required parameter. Just disable or enter 0 at start height operation parameter

Thank you that fixed it