My domain has failed to validate

My domain has failed to validate

Hello,
 
My issue is that I would like to set up other users on my account but from what I've come across, it appears as though in order to add users, I need to verify my domain. 
 
I've followed the CNAME instructions in the control panel "Domain" section (I originally purchased my domain name through Google Apps/enom) but its been several hours since I made the changes for the validation process, and it still says "CNAME domain validation failed" when I click on "validate" under my domain's status. 
 
I would be very appreciative if someone at Zoho could provide me some assistance in this issue.
 
Thank you,
 
Marc