The prolem with Percona Amazon RDS Monitoring Template

[thinhduckhoi]

Hi guys!
The leader in my team asked me to monitor RDS Instance AWS using Cacti so I gave Google a quick search and found out about this Percona Amazon RDS Monitoring Template for Cacti. This was the article that i followed.
https://www.percona.com/doc/percona-...templates.html

The point is when i was trying to test the scripts, there was a error came up said: Unable to get a RDS statistics.
I checked the AWS key carefully and i'm sure there is nothing to do with this.

So i was trying to add a RDS template in XML format downloaded from Percona homepage but when i add a new device in Cacti, i dont know how to do with that RDS because RDS doesn't have IP.
What to do with Downed Device Detection option ??
In the case i left it out, the graph appeared with no data. I dont know why. You guys have any idea about it?

*Besides, when i was trying to use Percona Apache and Percona MySQL template from XML file and adding a device which is my host I'm using normally (Apache and Mysql installed and running) but i couldn't get any data. So didn't i configure correctly or this fault is relared to Percona template?