500Internal Server Error
在今晚测试wamp的项目时，当我导入一个项目到www目录下时出现如下错误：
Internal Server Error
The server encountered an internal error or misconfiguration and was unable to complete your request.
Please contact the server administrator, admin@localhost and inform them of the time the error occurred, and anything you might have done that may have caused the error.
More information about this error may be available in the server error log.
apache错误日志如下：
[Mon May 16 10:02:30 2011] [alert] [client 127.0.0.1] D:/wamp/www/Think/.htaccess: Invalid command 'RewriteEngine', perhaps misspelled or defined by a module not included in the server configuration
从百度找到了如下两种方法，其中第一种就是将mod的重写方式开启，这样就可以避免764文件夹权限的问题了。
解决1：
1. 打开 httpd.conf
2.找到 mod_rewrite.so 行,将前面的注释打开(即删掉前面的'#'符号)。
3.关闭httpd.conf,重启apache服务器即可。
解决2：
httpd.conf 中找到你网站目录对应的Directory 行,将其中的 RewriteEngine 项设置为 'ALL'。
