No Data for VPN Reports

Hi,

I'm a newbie with Firewall Analyzer. I have some few questions regarding VPN Reports.

I was wondering why there's no data available for:
- Top VPN Users
- Top VPN Hosts
- Top VPN Clients
- Top VPN Protocol Groups
- VPN Summary
- VPN Traffic Usage Trend

What are the things, setup or configuration that I should do inorder to have data on VPN Report?

Need help. Thanks.

Silver Hawk