custom domain name with a Blogger account

Currently I'm using a custom domain (hcfoo.com) but my blog is still hosted by Blogger. After purchased the domain name at GoDaddy, I tried to configure the settings but failed many times because both Blogger help site and GoDaddy support team gave me different information.

How do I use a custom domain name on my blog?
How do I create a CNAME record for my custom domain?

In the end Blogger help site is correct but what I did wrong was I typed hcfoo.com instead of www.hcfoo.com in my Blogger setting (under Publishing).

By the way, GoDaddy provides FREE host and email (I set mine as blogger@hcfoo.com) but I decided to just keep the free host since I'm using Blogger as my host.

Updates: After a couple of hours my blog failed again. I reported the matter and received an instruction from GoDaddy support teamto rectify the problem.

Dear Sir/Madam,

Thank you for contacting Online Support. You can forward your domain directly to an IP address by modifying the A record for your domain. Please follow the directions below to accomplish this:

First, log into your customer account:

. Go to the Go Daddy Account Login Page
. Log in using your account username (which may be the same as your customer number) and password

If you have trouble logging in, our password reset form may help you. You can find this form through the following link:
Account Retrieval Page

Once logged in, follow these steps:

. Select 'Manage Domains' from the 'Domain Names' menu at the top of the page
. Click on the domain you wish to Forward (Setup an A-Record) for
. Click the '+' next to "Total DNS Control" from the menu. (This option will only be available for domains Parked or Hosted on our servers)
. Click the 'Total DNS Control And MX Records' link
. Enter the IP address for the '@' Zone Record Value and click 'Save'

Please allow 1 hour for the Zone File to be updated with this new information. Your domain will then physically point to the IP address entered.

Sincerely,
Online Support
Technician

It worked. Hence it shows that the instruction in Blogger is incomplete and user needs to enter and divert to Google's IP address which is 72.14.207.121 in the A(Host) in Total DNS Control.