Yes we know the addon domain has the same IP as the main account
but the question is whether your computer at home is resolved the
correct IP address or not.
Bring up a DOS window (or shell if running Linux) and type:
Code:
ping yourdomainname.com
What IP address is shown on your computer?
Is the IP address shown, the same as your new hosting account?
If you just recently (within the last 72 hours) changed the DNS servers
on the addon domain to point to your new hosting account, it is possible
that your ISP or your own computer is using old cached routing information
instead of the actual live DNS information and your computer is instead
trying to connect to where the domain USED TO BE before moving it
instead of where it is located now. If the account no longer exists
where the domain used to point, you would be shown the default page
on that server instead of a web hosting account.
If your computer is showing the wrong (old) IP address when you
check from your computer, there is something you can do to fix that
and force your computer to go to the correct IP address:
In Linux, it's /etc/hosts
Under Windows, C:\Windows\System32\Drivers\Etc\Hosts
If you put the domain name and IP address in that file,
your computer will use the IP address you specify when
trying to connect instead of normal DNS resolution.
PS: Per your topic subject, addon domains don't have files in /public_html
For "addon" domains, you just drop the files where FTP connects and
don't have to change to "/public_html" like you do with the main domain.