title: boto ec2 connect to region is not working in a EC2 instance in Amazon VPC
body: <pre><code>ec2 = boto.ec2.connect_to_region(regionName)
  </code></pre>
  
  <p>gets hung in a instance in VPC. 
  boto ec2 connect to region is not working in a EC2 instance in Amazon VPC but the same thing works outside Amazon VPC.</p>
  
  <p>What are the things I need to check ?</p>
  
  <p>Thank you</p>