appserv 配置多站点,该如何解决

appserv 配置多站点
我的网站移动域名m.xxx.com
我要把这个域名指向我服务器的一个m目录，
我在httpd.conf配置文件里加入

<VirtualHost m.xxx.com:80>
ServerName "m.xxx.com:80"
DocumentRoot "D:wwwAppServwwwm"
<Directory "D:wwwAppServwwwm">
Options Indexes FollowSymLinks
AllowOverride None
Order allow,deny
Allow from all
</Directory>
</VirtualHost>

是在Listen 80后面加入，然后我域名解析m.xxx.com解析A记录到服务器IP地址

现在的情况是我访问www.xxx.con和m.xxxx.con都是访问服务器的M目录，就是主域名也访问M目录了，
请教怎么让主域名访问之前的主页，只让m.xxx.com，访问服务器M目录

另外，我在本机，配置一个正常
<VirtualHost 127.0.0.2:80>
ServerName "127.0.0.2:80"
DocumentRoot "D:wwwAppServwwwm"
<Directory "D:wwwAppServwwwm">
Options Indexes FollowSymLinks
AllowOverride None
Order allow,deny
Allow from all
</Directory>
</VirtualHost>

127.0.0.1 访问PC版，127.0.0.2访问的是移动版


------解决思路----------------------

<VirtualHost *:80>
ServerName www.xxx.net
DocumentRoot "D:wwwAppServwww"
<Directory "D:wwwAppServwww">
    Options Indexes FollowSymLinks
    AllowOverride None
    Order allow,deny
    Allow from all
</Directory>
</VirtualHost>


<VirtualHost *:80>
ServerName m.xxx.net
DocumentRoot "D:wwwAppServwwwm"
<Directory "D:wwwAppServwwwm">
    Options Indexes FollowSymLinks
    AllowOverride None
    Order allow,deny
    Allow from all
</Directory>
</VirtualHost>