Discuz!EXP 5.5.0在本地配置虚拟主机为什么只有虚拟主机A有效

Discuz!EXP 5.5.0在本地配置虚拟主机为什么只有虚拟主机A有效，其他无效呢？怎样解决啊！



虚拟主机1：  a.com    存放地址:c:/a


虚拟主机2:    b.com   存放地址:c:/b


虚拟主机3:    c.com   存放地址:c:/c

ThreadsPerChild 250
MaxRequestsPerChild  0

LoadModule actions_module modules/mod_actions.so
LoadModule alias_module modules/mod_alias.so
LoadModule asis_module modules/mod_asis.so
LoadModule auth_basic_module modules/mod_auth_basic.so
#LoadModule auth_digest_module modules/mod_auth_digest.so
#LoadModule authn_anon_module modules/mod_authn_anon.so
#LoadModule authn_dbm_module modules/mod_authn_dbm.so
LoadModule authn_default_module modules/mod_authn_default.so
LoadModule authn_file_module modules/mod_authn_file.so
#LoadModule authz_dbm_module modules/mod_authz_dbm.so
LoadModule authz_default_module modules/mod_authz_default.so
LoadModule authz_groupfile_module modules/mod_authz_groupfile.so
LoadModule authz_host_module modules/mod_authz_host.so
LoadModule authz_user_module modules/mod_authz_user.so
LoadModule autoindex_module modules/mod_autoindex.so
#LoadModule cern_meta_module modules/mod_cern_meta.so
LoadModule cgi_module modules/mod_cgi.so
#LoadModule dav_module modules/mod_dav.so
#LoadModule dav_fs_module modules/mod_dav_fs.so
LoadModule deflate_module modules/mod_deflate.so
LoadModule dir_module modules/mod_dir.so
LoadModule env_module modules/mod_env.so
LoadModule expires_module modules/mod_expires.so
#LoadModule file_cache_module modules/mod_file_cache.so
#LoadModule headers_module modules/mod_headers.so
LoadModule imagemap_module modules/mod_imagemap.so
LoadModule include_module modules/mod_include.so
LoadModule info_module modules/mod_info.so
LoadModule isapi_module modules/mod_isapi.so
LoadModule log_config_module modules/mod_log_config.so
LoadModule mime_module modules/mod_mime.so
#LoadModule mime_magic_module modules/mod_mime_magic.so
#LoadModule proxy_module modules/mod_proxy.so
#LoadModule proxy_ajp_module modules/mod_proxy_ajp.so
#LoadModule proxy_balancer_module modules/mod_proxy_balancer.so
#LoadModule proxy_connect_module modules/mod_proxy_connect.so
#LoadModule proxy_http_module modules/mod_proxy_http.so
#LoadModule proxy_ftp_module modules/mod_proxy_ftp.so
LoadModule negotiation_module modules/mod_negotiation.so
LoadModule rewrite_module modules/mod_rewrite.so
LoadModule setenvif_module modules/mod_setenvif.so
#LoadModule speling_module modules/mod_speling.so
LoadModule status_module modules/mod_status.so
#LoadModule unique_id_module modules/mod_unique_id.so
#LoadModule userdir_module modules/mod_userdir.so
#LoadModule usertrack_module modules/mod_usertrack.so
#LoadModule vhost_alias_module modules/mod_vhost_alias.so
#LoadModule ssl_module modules/mod_ssl.so

<Directory />
    Options FollowSymLinks
    AllowOverride None
    Order deny,allow
    Allow from all
    Satisfy all
</Directory>

<IfModule dir_module>
    DirectoryIndex index.html index.htm index.php
</IfModule>

<FilesMatch "^\.ht">
    Order allow,deny
    Deny from all
</FilesMatch>

ErrorLog logs/error.log

LogLevel warn

<IfModule log_config_module>
    LogFormat "%h %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\"" combined
    LogFormat "%h %l %u %t \"%r\" %>s %b" common

    <IfModule logio_module>
      LogFormat "%h %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\" %I %O" combinedio
    </IfModule>
    CustomLog logs/access.log common
</IfModule>

<IfModule alias_module>
</IfModule>

DefaultType text/plain

<IfModule mime_module>
    TypesConfig conf/mime.types
    AddType application/x-compress .Z
    AddType application/x-gzip .gz .tgz
    AddType application/x-httpd-php .php
</IfModule>

# Server-pool management (MPM specific)
#Include conf/extra/httpd-mpm.conf

# Multi-language error messages
#Include conf/extra/httpd-multilang-errordoc.conf

# Fancy directory listings
#Include conf/extra/httpd-autoindex.conf

# Language settings
#Include conf/extra/httpd-languages.conf

# User home directories
#Include conf/extra/httpd-userdir.conf

# Real-time info on requests and configuration
Include conf/extra/httpd-info.conf

# Virtual hosts
#Include conf/extra/httpd-vhosts.conf

# Local access to the Apache HTTP Server Manual
#Include conf/extra/httpd-manual.conf

# Distributed authoring and versioning (WebDAV)
#Include conf/extra/httpd-dav.conf

# Various default settings
Include conf/extra/httpd-default.conf

# Secure (SSL/TLS) connections
#Include conf/extra/httpd-ssl.conf
#
# Note: The following must must be present to support
#       starting without SSL on platforms with no /dev/random equivalent
#       but a statically compiled-in mod_ssl.
#
<IfModule ssl_module>
SSLRandomSeed startup builtin
SSLRandomSeed connect builtin
</IfModule>

### Discuz!EXP Web Server Settings


Listen 80
ServerName localhost
ServerAdmin webmaster@domain.com
ServerRoot "C:\Discuz!EXP\Apache2"
DocumentRoot "C:\Discuz!EXP\wwwroot"
LoadModule php5_module "C:\Discuz!EXP\PHP5\php5apache2_2.dll"
PHPIniDir "C:\Discuz!EXP\PHP5\php.ini"
<Directory "C:\Discuz!EXP\wwwroot">
Options Indexes FollowSymLinks
Order allow,deny
Allow from all
</Directory>
Alias /icons/   "C:\Discuz!EXP\Apache2\icons\"
<Directory "C:\Discuz!EXP\Apache2\icons">
Options Indexes MultiViews
AllowOverride None
Order allow,deny
Allow from all
</Directory>
NameVirtualHost *:80
<VirtualHost *:80>
ServerAdmin webmaster@domain.com
DocumentRoot "C:\Discuz!EXP\wwwroot"
ServerName *
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteRule ^(.*)/archiver/([a-z0-9-]+.html)$ $1/archiver/index.php?$2
RewriteRule ^(.*)/forum-([0-9]+)-([0-9]+).html$ $1/forumdisplay.php?fid=$2&page=$3
RewriteRule ^(.*)/thread-([0-9]+)-([0-9]+)-([0-9]+).html$ $1/viewthread.php?tid=$2&extra=page%3D$4&page=$3
RewriteRule ^(.*)/profile-(username|uid)-(.+).html$ $1/viewpro.php?$2=$3
RewriteRule ^(.*)/space-(username|uid)-(.+).html$ $1/space.php?$2=$3
</IfModule>
</VirtualHost>
<VirtualHost *:80>
DocumentRoot "C:\a"
ServerName a.com
</VirtualHost>
<VirtualHost *:80>
DocumentRoot "C:\b"
ServerName b.com
</VirtualHost>
<VirtualHost *:80>
DocumentRoot "C:\c"
ServerName c.com
</VirtualHost>