Problem with altering objects gravity

I use the gravity toggle in the physics tool gun and nothing can go zero grav anymore. I can’t remember when exactily it started, but it’s becoming a real annoyance. Anyone have a fix?

Wrong section. If my fix does not work, repost it over in http://www.facepunch.com/forums/16-Help-amp-Support

Now, did you try reinstalling your Garry’s Mod?

Sorry. I’ll just re post.