Ubuntu 下rewrite 无法启动

[Rico_2012]

最近在学zendframework2
用的是ubuntu 12.04 做服务器
/etc/apache2/sites-available/下建立zend 文件如下

NameVirtualHost *:80
<VirtualHost *:80>
	ServerName www.zend.local

	DocumentRoot /opt/htdocs/zf2/public

	SetEnv APPLICATION_ENV "development"

	<Directory /opt/htdocs/zf2/public>
		DirectoryIndex index.php

		AllowOverride All

		Order allow,deny

		Allow from all
	</Directory>
</VirtualHost>

zendframework/public/.htaccess文件如下：

RewriteEngine On
# The following rule tells Apache that if the requested filename
# exists, simply serve it.
RewriteCond %{REQUEST_FILENAME} -s [OR]
RewriteCond %{REQUEST_FILENAME} -l [OR]
RewriteCond %{REQUEST_FILENAME} -d
RewriteRule ^.*$ - [NC,L]
# The following rewrites all other queries to index.php. The 
# condition ensures that if you are using Apache aliases to do
# mass virtual hosting, the base path will be prepended to 
# allow proper resolution of the index.php file; it will work
# in non-aliased environments as well, providing a safe, one-size 
# fits all solution.
RewriteCond %{REQUEST_URI}::$1 ^(/.+)(.+)::\2$
RewriteRule ^(.*) - [E=BASE:%1]
RewriteRule ^(.*)$ %{ENV:BASE}index.php [NC,L]

该文件是由 github自动生成的
然后我把/etc/apache2/sites-available/default,/etc/apache2/sites-available/default-ssl里的AllowOverride None 全改成 AllowOverride All了
实际运行zendframework，首页没问题，但访问别的目录无法跳转到index，请问是什么原因？有遇到同样的问题的吗？ rewrite模块确认已开启，实在找不到是哪里的问题