XDCR - adding remote cluster fails
I am running CB at EC2 and was trying to add a remote cluster. I assigned a EIP to the new CB which I use and try adding it along with port 8091 but it fails:
I also tried the REST API:
curl -v -u Administrator:********** http://THE_IP_ADDRESS:8091/pools/default/remoteClusters
it authorizes etc. but returns empty json  response (path /pools/default/buckets returns a non empty JSON with various info, I also tried restarting the couchbase-server and tried again, same result).
I have opened the proper ports in the firewall. I have not yet configured it for DNS instead of IP, so I also tried to call
curl -v -u Administrator:********** http://PRIVATE_IP_FROM_A_INSTANCE_IN_SAME_REGION:8091/pools/default/remo...
but that returned  as well.
I am running the latest 2.0.0 enterprise deb on ubuntu 12.04.