How to print number like 1, 1.1. is Table of content in RPE

Hi,
Am trying to print number like 1, 1.1. 1.1.1,2., in table of content ,So i check sample rpe template, when i used the style i am not able to get the output as expected.What will be reason for that or how can i achieve to get number in table of content like 1.introduction 2.purpose like that.