Forward Accounting Packets to Fortiage - need help

FreeRADIUS Version 2.1.12, Ubuntu 14.04 LTS I'm trying to send copy of accounting packets to Fortigate. Is there any official documentation / example for this ?. I'm trying to get "Group" info of authenticated users for providing access to other networks thru RSSO. I configured as per the following blog, https://freeradiustips.wordpress.com/2015/02/17/forward-accounting-packets-t... Fortigate interface is listening for Radius Accounting packets, yet i'm not getting any accounting packets from freeRadius. Not sure i've missed anything vital. Thanks, Eby