How does the Plugin create a new user for a website?

Hi,

i just installed a fresh mu-site with some of your plugins and a server with whmcs.

While the mu-site is created in the network, there is no new Admin added. The Sites Admin is the Network-Admin.

I read a Tutorial, but it seemed to me, that this should work "out of the box".

You got an idea?

Thanks a lot!
Carsten