Multi Site Manager Login for new sites

Update: We've just released a replacement for Multi Site that has many more features, is much more robust and is guaranteed to work! You can get it here

Hi,

I've recently installed the Multi-Site-Manager plugin. I can easily create new sites (domains) but I cannot loggin to the new site.

I've tried with the admin login of the MU platform : impossible. I even tried to create a new user, it doesn't work

Hope someone could help

Thanks