I was setup Drupal (CMS) in free hosting 000webhost.com and one option from Drupal are Clean URLs. But in first time after install completed, I can not enable Clean URLs.
After search in forum of 000webhost.com (by Google search), I found the trick to enable Drupal Clean URLs
Step 1. Disable 000webhost analytics (here).
Step 2. Edit .htaccess file in root (Drupal) directrory, by remove "#" before "RewriteBase /" in line 100 and save change (in case user Drupal 6.4).
Step 3. Back to menu "Site Configure > Clean URLs" and enable, finish !
I do not know why, but it is work. Good luck.
