on my first attempt to create a new account i get the message
The target server has reached its licensed limit of 0 account(s); please upgrade your license if you require additional accounts

there is no accounts on this server at all
is it a server setting ?

Hello psystationradio,

This is a license issue, you may need to re-issue your license key, or if you're using a free trial license, then either the license is expired or you are using it on a different IP address that it was originally issued for.

It could also mean that your updates and support agreement has expired, and you are using a version of Centova Cast that was released after this expiration date, or that you simply have made a mistake while copying or installing your key, if you are moving from a free trial to a paid license.

For the first case, this should help:

http://www.centova.com/en/faq/cast3/information/changing_licensed_domain_name_or_ip_address

If you need further assistance, please contact our support department directly.