Domain Mapping Plugin Menu not showing up

I have a multisite with the domain theartofwebdesign.com with subdomain demo.theartofwebdesign.com
WPMU Domain Mapping is installed and in the network dashhboard settings the IP is inserted.
Domain Mapping Plugin is network enabled.
But at the subdomain dashboard the domain mapping menu is not showing up.
Where should the menu be found and why is it not showing?