title: Unable to RDP to EC2 instance
body: <p>I created a VM using Hyper-V on my local machine which I can RDP onto fine. I exported the VHDX to VHD and then uploaded it to AWS via the API. 
  This created a new EC2 instance for me but I cannot connect to it as it has no security keypair associated. 
  Thus I created a private AMI from the instance and re-instantiated a new EC2 instance from this AMI, setting the keypair in the process to ensure HTTP, RDP etc are permitted. The EC2 instance is running, but when I download teh RDP shortcut if fails to connect. I've tried rebooting the instance several times (as this was one of the suggested solutions on here when I searched) but it hasn't helped.</p>
  
  <p>I also cannot ping any of these instances via the public DNS or private DNS.</p>
  
  <p>Any idea what I'm doing wrong? I'm not even getting as far as the password prompt, its the connectivity is the problem.</p>
  
  <p>Thanks</p>