Can't register new account with my e-mail

Can't register new account with my e-mail

Hello,

I'm trying to create a new account at https://www.zoho.com/desk/signup.html?plan=Free using my e-mail adress whose domain is [at]iselin.com.ar, located in Argentina, but I get the error "The email which you have entered belongs to a different deployment/region", as if I'm specifying my e-mail address or location wrong, but everything has been correctly typed in or selected.

What can I do about this?
Thanks in advance.