Doesn't create user and site into another site

I have 2 domains and

I install this plugin in to
at back-end i added into with Single Signon

at front-end I register new user and create site ""

I go to "" i see erroe "Not Found "
and i go to back-end don't see new user and new site (myblog) add in to this

I only see new user add in

What sould i do next ?