Specific theme with sections-module

Hi,

I don´t know if this is a bug or I do something wrong.
I have to websites with a different theme, and I have installed sections-module to change the theme for "blog" AND "blog/*"
For my default website this is working.

The blog-theme isn´t used from my second website.

Can somebody help me with this?
Has this something to do with "custom_theme" or ...

Jurgen