I have some experience with roland colourchoice which I believe is supplied with your machine. My version is quite old but I hope it still works the same way. I assume you are trying to print and my version of colourchoice needs a file to work with. A number of formats can be used but the most common would be .eps format. There are others (check the import / open option ).
In corel you have to choose to export your image. Once again there are various files you can export but one of them should be .eps
note the directory you save into.
After importing the.eps into colour choice you should be able to send to the pc600.
This will send through a usb port.
for cutting you will find a .dxf file best, I think.
If the new colourchoice does not work this way then I wish you good luck !.
It should be all in the instruction manual or help screens.