CorelDRAW Graphics Suite X5 :: Regular Loss Of Text Or Letters In Printable Drawing Or Text?

I am using Corel for driving a fiber laser through a dedicated Net connection not available to the rest of the network and it and my computer are right next to the switch.

My problem is that when I send a job from the PC to the laser it works fine.  If I make a small change on the graphics, I save it and send a new job to the laser.   Quite often, some part of my grapics is left off the plot even though I didn't touch that graphic or mod it.  So I send the job over again and now somewhere else is missing some of the graphic word...usually a word or a letter or number.   I usually turn off the computer or get out of Corel and come back in and it is fixed.   That doesn't sound like a network dropped or corrupted graphic.  I have tried turning off the laser with Corel still up and it doesn't fix the problem when I bring the laser on line again.