[quote:bc6344e6b4="Zuwani"]So I changed my user profile to disabe BBCode and checked the Disable BBCode in this post box.[/quote:bc6344e6b4]

No, you want BBCode enabled.  There is no special setting that has to be set on the admin side for it to work for people.  The 2 reasons I gave above are the only 2 reasons it wont work for someone.