What version of illustrator were you using & how did you save the file for export into VCP ?
Adrian is correct when he says that the best long term solution is to learn how to use the drawing tools in VCP & create all your artwork within the program. Having said that I struggle myself to do that consistently, for anything fairly basic then I use the drawing tools within the program, if it's something more complex then I revert back to what I know & have been using for lots of years to create vector artwork
Having used the same signmaking software for years & knowing how to use it pretty well it is sometimes difficult to stick to learning something new especially if your working on something that needs doing fairly quickly.
What I have found is that exporting as an EPS file gives me far better results than any other file format that can be imported into VCP. In fact EPS works pretty well when imported into any of the software that I use, not just VCP.
I am slowly learning to use the tools within the program for creating artwork but I have never had a problem with any of the files I have created with other software & then imported