Piwik ec2 installation with RDS failed

I am trying to setup piwik on one existing ec2 instance and uses existing RDS.

But I am stuck here as per attached image.

is there anyone can provide tutorial on how to continue with the installation?


i am having the same problem but it looks like you are one step ahead of me. how do you get past the connection error? i mean the url for RDS.

Can’t remembet what I have done but check the permission for ec2 to access Rds.