weird problem with commands

Okay, so if i don't /login it will tell me "You can't use commands before u login bla bla blah"

after i login and spawn if i do /jail, /slap no matter what level i am it says i don't have the privilege to use this command..

I don't know which code do i need to show since it's with all my commands.. do i need 1 command to show for example?