大侠们，救急啊，关于apache转发的问题。

我有个一级域名个二级域名 www.aaa.com 和 bbs.aaa.com
我现在apache的端口号是80 tomcat的是8080 iis的是8181
我在httpd.conf 文件里写了下面的代码 但是输入www.aaa.com 和bbs.aaa.com 都是访问的iis上的网站啊，这是什么原因啊？

<VirtualHost *:80>
  ProxyPreserveHost On
  ServerAdmin admin@wwksw.com
  DocumentRoot "E:/apache/docs/dummy-host2.somenet.com"
  DirectoryIndex index.html index.htm index.aspx
  ServerName www.aaa.com
  DefaultLanguage zh-CN
  AddDefaultCharset GB2312
  ProxyPass / http://www.aaa.com:8181/
  ProxyPassReverse / http://www.aaa.com:8181/
  ErrorLog "logs/dummy-host2.somenet.com-error.log"
  CustomLog "logs/dummy-host2.somenet.com-access.log" common
</VirtualHost>

<VirtualHost *:80>
  ServerAdmin admin@wwksw.com
  ServerName bbs.aaa.com
  DirectoryIndex index.html index.htm index.jsp
  DocumentRoot "E:\Tomcat 6.0\webapps\Cadres"
  JkMount /* ajp13
  JkAutoAlias "E:\Tomcat 6.0\webapps\Cadres"
  Options Indexes FollowSymLinks
  <Directory "E:\Tomcat 6.0\webapps\Cadres">
  Options IncludesNoExec
  Allow from all
  </Directory>
</VirtualHost>

<VirtualHost *:80>
  ProxyPreserveHost On
  ServerAdmin admin@wwksw.com
  DocumentRoot "E:/apache/docs/dummy-host2.somenet.com"
  DirectoryIndex index.html index.htm index.aspx
  ServerName www.aaa.com
  DefaultLanguage zh-CN
  AddDefaultCharset GB2312
  ProxyPass / http://www.aaa.com:8181/
  ProxyPassReverse / http://www.aaa.com:8181/
  ErrorLog "logs/dummy-host2.somenet.com-error.log"
  CustomLog "logs/dummy-host2.somenet.com-access.log" common
</VirtualHost>

8081 配成tomcat的端口