CHMOD problems

Well, I don't think it's a problem with SmartFTP
but i can't change my CHMOD permissions for some of my folders in my IPB forums.
I even tried a diff FTP program.
I tried CPanel.
NOTHING will change the perms of these folders.
I even tried it on a diff computer.
I have to change them to install everything correctly, and it says

Can anyone help me please?

Hi there,

I think there is a permissions issue, so the quickest way would be to contact your web host and explain what you're trying to do.

Good luck!

Kathy