$userinfo will probably contain the settings for the user browsing the profile, not for the user owning that profile.
Try using $show[field6] instead of $profile/$userinfo.
Are you sure, Marco? My cheatsheet (which I admit could be wrong!) says $userinfo for the user you are viewing and $bbuserinfo for you the browser/viewer.
To the OP, one way to check.... you know what *your* field6 should be, is that what is showing up in the page?