How to Get All Projects ?

How to Get All Projects ?

Hi,

I am using the following API to retrieve all projects from zoho.

https://projectsapi.zoho.com/portal/PortalName/api/private/json/projects


It returns only one project from zoho whereas there are more than 20 projects in our zoho account.
Parameters passed are as follow:

auditIndex=1
range=20
status=active

Please help me to get all projects. Where I am going wrong?