I too had the same problem and was able to fix it. Go to [File-Security-User Security-What Others Do-Using Workstation]. Now here is where you will have to experiment a little because I checked the following fields for three different "when code is signed by:" names so it's hard to tell exactly which one fixed it.
The fields that I checked that were not checked:
-- Read from property broker
-- Write to property broker
Like I said I checked all three fields for three different "signed by" names so 9 total. Up to you to find which one works for you but at least I got you in the neighborhood.