Domein Mapping Subfolder Multisite installed into subfolderr not root

Hi Support,

I Chose the Domain Mapping plugin. I hoped it would help me out. I installed WP Multisite into a Subfolder, i am using Subdirectory for the sites structure. The free plugins to handle Domain Mapping where unable to handle this if WP MU is installed into a subdirectory. I had hoped your plugin would not have this issue and could be able to map domains with my setup.
i Installed WP 3.5.1 into:
http://www.cloudinside.nl/wpcloud (subdirectory mu sites)

i want to map:
http://www.willeanne.nl or willeanne.nl to the MU site: http://cloudinside.nl/wpcloud/willeanne/
so when i go to tools Domain Mapping and enter:
http://www.willeanne.nl as the custom value it makes it to willeanne.nl/wpcloud and it is not mapped to the website correctly.

Can you inform me? Thanks in advance.