Trouble Updating Existing Form

For the last two days, when I edit I form I’ve already created and placed on my draft web site, i get the error message: “Not Acceptable! An appropriate representation of the requested resource could not be found on this server. This error was generated by Mod_Security.” I can make the edit alright, but the update won’t work.

I’m not terribly technically proficient, so any help would be appreciated.

The page I need help with: [log in to see the link]