Traffic Flow Graphs for Fortigate 60D not updating in OP Manager

Hey Guys,

I need a help with adding Fortigate 60 D firewall in OP manager. I have added it in OP manager with SNMP key authentication and everything was fine. It has discovered all interfaces and I can see the realtime traffic when I click the button available for Realtime Traffic after the interface name list

But when I open a Interface and go inside it, I cannot see the traffic graphs ( Traffic - Today, Errors and Discards - Today, Total bytes Transferred - Today, Packets Per Second - Today, Availability etc ).

Please let me know if I need to configure any thing else to show up these details?

Kindly suggest...

Let me know any additional information you need..

Thanks in Advance !!!!

Rahul S Lal