How do I map a custom domain to an AWS Elastic Beanstalk URL?

I follow the instructions on Using custom domains with AWS Elastic Beanstalk to map a custom domain to an AWAS Elastic Beanstalk URL .

My elastic beanstalk url is as follows:

http://myenvironment-specific-string.elasticbeanstalk.com/

I created a CNAME record that says:

www.example.com     myenvironment-specific-string.elasticbeanstalk.com  8 hrs

I also looked at CNAME using the MxToolBox CNAME search tool , where it shows it correctly. But when I try www.example.com, it does not appear.

Am I missing something? I'm stuck and it upsets my brains! Help me!: (