Insert a CS3 Illustrator multi layered design into a Coreldraw design

Hi, to everyone.

I've been working on some design on an old (great) Coreldraw 9, I ve just upgraded it to the 2019 version on my PC

I wish to add into my coreldraw design, a world map wich has been made on Illustrator CS3 (Mac).

This map is multi layered (one for montains, one for cities, one for countries names, city names etc etc)

I tried to import the file into coreldraw but it doesn't show some of the layers (background and seas) Names and coast line are imported. I don't understand why ...

Anyone could help ?

Best regards