hy,
i got a problem on word 2007 for generate chapter numbers.

I select my text and click on Title 1 in style box : I got the correct change :

1. My Chapter 1

I select a second part under Title 1 : correct change :

1.1 My ubber chapter 1.1

But after when I want add another part of main title, it is the chapter's number which raise, not the ubber chapter's number. For example, after creating my 1.1 tiltle, I select another part of text, click on Title 2, and this time :

2.1 My ubber chapter 1.2

So when I click on style option how can I do to have the correct syntax for my chapters ? Like 1.2 instead of 2.1. Thanks in advance.