MyBB Community Forums

Anyone can help me to setup rss feed poster plugin 
i have installed already amd also add feed 
for feed link i given this <- snip -> and set time 2 minutes  
i wait for 20 minuets but no response 
can anyone tell me what is right method

feed link from a MyBB forum should be made from rss/syndication link

for eg. MyBB community forum rss feed link

https://community.mybb.com/syndication.php