Css Cannot Work

[color=#282828][font=arial, verdana, tahoma, sans-serif][size=3]Hi,[/size][/font][/color]

[color=#282828][font=arial, verdana, tahoma, sans-serif][size=3]You all have any idea why I made some changes in the correct css file, but is was nothing happen in the front end? Thank you.[/size][/font][/color]

clear the cache and browser cache also sometimes

To do it, open in your browser: http://www.your_domain.com/admin_script.php?cc&ctpl, where www.your_domain.com is the address of your store and admin_script.php is the name given to the default admin.php file.