Outline number headings

I've ran out of troubleshooting ideas..
My RH Webhelp has regular H1, H2 etc. without numbering. My Word style sheet has outline numbering:
1. Heading 1
1.1 Heading 2
1.1.1 Heading 3

My output is:
1. Heading 1
Heading 2
Heading 3

It does accept my font, size and etc., but not the numbering.

I've created a test project and started from scratch and it still doesn't work.
Help!