Erro为属于同一域的文件夹设置VirtualHost

Noob在这里。。我在Ubuntu机器上有以下文件夹结构

 /var/www/
        /folder1
        /folder2

现在我想将我的网址xyz.com重定向到folder1&xyz.com/blog到folder2。我正在使用以下Vhost配置文件

对于xyz.com到folder1

  <VirtualHost *:80>
    ServerAdmin webmaster@localhost
    ServerName xyz.com
    ServerAlias www.xyz.com

    DocumentRoot /var/www/folder1
    <Directory />
            Options FollowSymLinks
            AllowOverride None
    </Directory>
    <Directory /var/www/>
            Options Indexes FollowSymLinks MultiViews
            AllowOverride All
            Order allow,deny
            allow from all
    </Directory>
     .......
   </VirtualHost >

对于xyz.com/blog到folder2

   <VirtualHost *:80>
    ServerAdmin webmaster@localhost
    ServerName xyz.com/blog
    ServerAlias www.xyz.com/blog

    DocumentRoot /var/www/folder2
    <Directory />
            Options FollowSymLinks
            AllowOverride None
    </Directory>

    <Directory /var/www/>
            Options Indexes FollowSymLinks MultiViews
            AllowOverride All
            Order allow,deny
            allow from all
    </Directory>
     .......
   </VirtualHost >

当我在url中输入xyz.com时,它会为我提供folder1中的索引文件(正如预期的那样&correct),但当我输入xyz.com/blog时,它显示404:未找到错误

  Not Found

  The requested URL /blog/ was not found on this server.

  Apache/2.2.22 (Ubuntu) Server at socialcosmo.com Port 80

我花了几个小时在这上面,仍然无法解决问题:( 如有任何帮助,我们将不胜感激