Why facebook groups don't show up on my profile?

[Vince]

I've joined several groups in facebook but they don't show on m upy profile. Friends couldn't see which groups I've joined. But they could see other information or what I like/my interests on my profile. I've tried to edit the application settings but it simply didn't work. Can anyone tell me how I can solve this problem? Thank you!

[Marwan]

Account ---> Application settings ---> Groups ---> Edit settings ---> Privacy --->Info Section ---> Add
Privacy ---> Friends only
This setting controls the visibility of Groups's Box or Tab on your Profile.
Click the "Okay" button

Account ----> privacy settings ---> Basic Directory Information ---> View settings ---> See my interests and other Pages ---> Friends Only

Click the "Preview My Profile" button.