"Begründung: Anfragebegründung ungenügend"

This field is OPTIONAL
"Warum benötigen Sie weitere Hosts? (optional)"

Therefore the Administrator's response is incorrect.

How do I get another Hostname?

Thanks for your reply.
Unfortunately it appears the default D-Link URL format is not compatible with SPoint string.
Home routers do not have option to insert full SPoint string.
However manual updating is easily done from a browser bookmark.
'Danke'

Help please.
routers require:

Server address     ??????
Hostname      =    XXXX.spdns.org??.......XXXX??
Username   =     securepoint.de   Login Username??
Password=(token)

Not clear of server address....spdns.org???....spdyn.de???...update,spxx???
Is hostname prefix only?