Problems with vector fonts and embedding

Question

I have written a thesis, printing on the home-printer works fine, but for publishing, there are some problems concerning the embedding and fonttypes: I am using Miktex via TeXnic Center on Windows 7.

My current problem: I had a non-scaleable font first, now the normal text seems to be ok, but for formulas it doens't work. Here is a minimal example:

\documentclass[ 
   fontsize=12pt, 
   paper=a4, 
   german, 
   twoside=false 
     ]{scrbook} 

\usepackage[latin1]{inputenc} 
\usepackage[T1]{fontenc} 
\usepackage{lmodern}
\usepackage{cmbright}
\usepackage{ae}
\usepackage[ngerman]{babel} 


\begin{document} 

\chapter{testeins} 
aöüßLorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. 

\begin{equation} 
c = \sqrt{a^2 + b^2} 
\end{equation} 

\end{document} 

If I run this code, the formula enviroment is not a vector-font, therefore I can see the grid when I zoom in using a pdf reader. Analyzing it with pdffonts gives me:

name                                 type              emb sub uni object ID
------------------------------------ ----------------- --- --- --- ---------
ZNESZZ+CMSSBX10                      Type 1            yes yes no       4  0
IKIYOW+CMSS12                        Type 1            yes yes no       5  0
[none]                               Type 3            yes no  no       6  0
[none]                               Type 3            yes no  no       7  0
[none]                               Type 3            yes no  no       8  0
[none]                               Type 3            yes no  no       9  0

For my thesis it is even more complicated. hfbright and cm-super are installed. If I remove the \usepackage{cmbright}, text and formulas are ok.

I would really appreciate your help, I am quite desparate by now...