Can't ping public ip EC2 instance when IPSec tunnel is established

Regards,

Currently I have three EC2 public instances running within my VPC, and once you establish the IPSec tunnel following this guide (http://forum.mikrotik.com/t/amazon-aws-vpn-a-working-configuration-example-and-bug/79770/1), everything works perfect, but I can not access the IP’s public such instances, only private IP. If disable the IPSec tunnel, i can ping and access to the public IP’s, but not private (which seems logical). I need create a route or rule within my Mikrotik to access the IP’s public of my EC2 instances, once the IPSec tunnel established? I could give a hand with this? Thank you very much