Multisite does not create the site and the user

hi,
i use multisite and i have the BlogTemplate installed.
when a new user signup, he choose the site and it gives a message that it´s created.
but the site is never available and the user is not created too or visibel.

this on lr4life.com

but when i use a standard wordpress site on a clean instalation, it works....
what can be happen?