在icdsoft 使用 codeigniter 的clean url

icdsoft中使用 clean url

http://example.com/index.php/abc -> http://example.com/abc

出現錯誤, return 404

clean url CI doc:
http://codeigniter.com/user_guide/general/urls.html
solved by Google, CI wiki:
http://codeigniter.com/wiki/Dreamhost_.htaccess/ (solution1)

RewriteEngine on
RewriteCond $1 !^(index\.php|public|user_guide|robots\.txt)
RewriteRule ^(.*)$ /index.php?/$1 [L]

Note the question mark after index.php
Google