I set up an ec2 instance. In the security group, I opened up SSH 'tcp' port 80 for 0.0.0.0/0 (all open for testing purposes). I associated the instance with a private key. I downloaded the key and passed it while ssh-ing, but the RSA isn't authenticating. Any ideas?

ssh -i mykey.pem root@mydnsinfo.amazonaws.com 

The authenticity of host 'mydns.amazonaws.com(IP)' can't be established. 
RSA key finger print is FINGERPRINT 
Are you sure you want to continue connecting (yes/no)?

Thank you in advance!!!

ssh amazon-ec2
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