Dropdown List Based on Criteria

[cychua]

Hi All
Cracking my head for almost 6 hours in the office on this dropdown listing.

For hours of google-ing. Found this helpful links, http://contextures.com/xlDataVal15.html

But i able to make the dropdown as,
Region > Country > Country

Instead of,
Region > Country > Port

Together i had attached with my files. Hope you guys able to help a noob out.
Thanks in advance.