Why don't you just show us your list of SPNs?

The most important entries are:

setspn -A MSSQLSvc/<Fully qualified domain name of the server>:1433 domain\Account

setspn -A MSSQLSvc/<servername without domain>:1433 domain\Account

(Reporting Services)

setspn -A HTTP/<Fully qualified domain name of the server>:80 domain\Account

setspn -A HTTP/<servername without domain>:80 domain\Account

Greetz sql pizza