Numbering

[sean mike]

hi guys,

could someone guide me how to set numbering for my document? for example.


1.1. Introduction
1.1.1. Men
1.1.2. Old men

2.1. Objective
2.1.1. abc
2.1.2. cde

and so on.
.................................................. ..................................................
this section is my problem. when i am at section 2.1. the subsequent numbering will be like this.

1.1. Introduction
1.1.1. Men
1.1.2. Old men

2.1. Objective
1.1.3. abc
1.1.4. cde

it continued from the number of old men. could anyone advice me how to solve this problem?