Apache不解析Vhost里面的东东-redmine,该如何解决

Apache不解析Vhost里面的东东--redmine
我配置apache与redmine时，发现如下问题，还请懂的帮忙解决一下。。THS
我想实现用vhost.map访问redmine.aaa.com.cn
可以实验后发现只有用VirtualHost可行，这是怎么回啊，THS

在apache的配置文件中 httpd.conf 直接用VirtualHost端口，用http://redmine.aaa.com.cn可以访问，会正常访问到

HTML code

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redmine

<virtualhost>   

     ServerName redmine.aaa.com.cn    

     ServerAdmin webmaster@aaa.com.cn    

     DocumentRoot /usr/local/redmine/redmine-1.0/public    

  <directory>   

     Options Indexes ExecCGI FollowSymLinks    

     Order allow,deny    

     Allow from all    

     AllowOverride all    

  </directory>   

</virtualhost>  

 但是我用域名重定向规则，如
httpd.conf

HTML code

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RewriteCond %{HTTP_HOST} !(redmine.aaa.com.cn) [NC]

RewriteCond %{HTTP_HOST} !(www.aaa.com.cn) [NC]
RewriteMap lowercase int:tolower
RewriteMap vhost txt:/usr/local/apache2/conf/vhost.map
RewriteCond ${lowercase:%{SERVER_NAME}} ^(.+)$
RewriteCond ${vhost:%1} ^(/.*)$
RewriteRule ^/(.*)$ %1/$1

vhost.map如下：

HTML code

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#redmine
redmine.aaa.com.cn /usr/local/redmine/redmine-1.0/public
#aaa
www.aaa.com /var/www/aaa

出现了如下错误：
Application error
Rails application failed to start properly



------解决方案--------------------
是不是要配置成支持AllowOverride