I know that Wp-spamfree is the best tools to block spammer...
but wait, there is something I don't know why.
My contributors able to see (and change) the settings of WP-SpamFree.
Is it a bug? and How to resolve this?
Here is the screenshot.. http://i38.tinypic.com/24wrqtz.jpg
FYI, I don't change any settings on my user roles.
Thanks for support.