WordPress MU

Hi

sorry by my english :)

I have WMPU 2.7, install to root dir: blogs.name
Users blogs - in sub directory: blogs.name/user_blog

When i login as admin - all ok, but when i registered user and login to her blog, i see what default template not work:
http://talk.lg.ua/blog.gif

Default template not work on users blogs! Why?

our admin say: "nginx work as frontend proxy", may be this reason?

nginx is a reverse proxy? you might have to ask them to set up virtual hosts to allow pass thru