Trac ignores Apache-alias to static files

Hello,

I'm installing Trac 0.12.3 via easy_install and run it with Python 2.7 inner Apache/WSGI-configuration which starts Trac on the subdomain 'trac.mutetella.org'. This is my Apache 'httpd.conf':

ServerRoot "/home/claus/webapps/apache/apache2"

LoadModule alias_module       modules/mod_alias.so
LoadModule authz_host_module  modules/mod_authz_host.so
LoadModule auth_digest_module modules/mod_auth_digest.so
LoadModule authz_user_module  modules/mod_authz_user.so
LoadModule authn_file_module  modules/mod_authn_file.so
LoadModule dir_module         modules/mod_dir.so
LoadModule env_module         modules/mod_env.so
LoadModule log_config_module  modules/mod_log_config.so
LoadModule mime_module        modules/mod_mime.so
LoadModule rewrite_module     modules/mod_rewrite.so
LoadModule setenvif_module    modules/mod_setenvif.so
LoadModule wsgi_module        modules/mod_wsgi.so

LogFormat "%{X-Forwarded-For}i %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\"" combined
CustomLog /home/claus/logs/user/access_apache.log combined
DirectoryIndex index.py
DocumentRoot /home/claus/webapps/apache/htdocs
ErrorLog /home/claus/logs/user/error_apache.log
KeepAlive Off
Listen 25482
MaxSpareThreads 3
MinSpareThreads 1
ServerLimit 1
SetEnvIf X-Forwarded-SSL on HTTPS=1
ThreadsPerChild 5
WSGIDaemonProcess apache processes=5 python-path=/home/claus/webapps/apache/lib/python2.7 threads=1
WSGIProcessGroup apache
WSGIRestrictEmbedded On
WSGILazyInitialization On

Alias /chrome/common /home/claus/webapps/trac/.static/htdocs/common
Alias /chrome/site /home/claus/webapps/trac/.static/htdocs/site

<Directory /home/claus/webapps/trac/.static>
  Order Allow,Deny
  Allow from All
</Directory>

WSGIScriptAlias / /home/claus/webapps/trac/.static/cgi-bin/trac.wsgi

<Directory /home/claus/webapps/trac/.static/cgi-bin>
    WSGIApplicationGroup %{GLOBAL}
    Order allow,deny
    Allow from all
</Directory>

<LocationMatch "/[^/]+/login">
    AuthType Digest
    AuthName "trac"
    AuthDigestDomain /
    AuthUserFile /home/claus/webapps/trac/.htpasswd
    Require valid-user
</LocationMatch>

<Directory "/home/claus/webapps/apache/htdocs">
    AddHandler wsgi-script .py
</Directory>

The Trac documentation says, if Trac runs under an Apache server, it is recommended to make an alias to the static files (see the 2 'Alias'-definitions above in my 'httpd.conf').

But it makes no difference if I run Apache with or without this Alias-definitions. Trac takes the static files never from the '.static'-path but only from the '.egg-cache'-path in the '/home/claus/webapps/trac'-path.

This is my 'trac.wsgi':

import os
import site

site.addsitedir('/home/claus/lib/python2.7')

os.environ['TRAC_ENV_PARENT_DIR'] = '/home/claus/webapps/trac'
os.environ['PYTHON_EGG_CACHE'] = '/home/claus/webapps/trac/.egg-cache'

import trac.web.main
application = trac.web.main.dispatch_request

Why ignores Trac the Apache-Aliases? What is wrong?

Thank you much for your help and sorry for my horrible english... ;-(

Claus