[Freeswitch-users] deny_refer_requests doesn't work

Hello, I need to deny refers per session so I found this chan variable and it worked for me in ver. 1.2.17. But after upgrade I can't force to work this variable. Where can be the issue? I use in my dialplan: <action application="set" data="deny_refer_requests=true"/> But I still see REFER in allowed methods. Tanks. Alex