You have to go to co.cc and register your choice with them. x10hosting does not give them out.
When you register your domain, you can use your account there to set the DNS nameservers to
ns1.x10hosting.com
ns2.x10hosting.com
You can have only one Free Hosting account.
But if you want to add another domain to your existing account, go to cPanel and use Add on Domains to add the domain to your account. The content will be served from a subdirectory of public_html
Checking whois.nic.mx , they do not show a record for that domain. Until that is cleared up, nothing you do here will mean anything.
Go back to your registrar and let them know that your domain does not show up on a whois search.
Log into cPanel
About 2/3 of the way down the page you will see the section Databases
Click on icon for phpMyAdmin
When it loads, click on link for your database (it is on the left side)
List of tables then will be on the left
So you are using your x10hosting account as a slave for another site.
Your x10hosting account is meant to be for itself. Not a warehouse for files. Not a remote MySQL account for another site.
Uploading a proxy to your account is a serious offense.
Your account will not be unsuspended and you will not be allowed back into your account to upload or download anything.
Your Free Hosting account will be deleted along with all its contents sometime after 14 days.