In preparation to upgrading to RLS 6.0 our vendor informed that we need to upgrade all 3900 series phone firmware to the latest versions. For the 3904 set we went to version 9.3. Ever since the firmware upgrades, I have phones(3904 sets) that loose their extensions and their programmed feature label keys. If I unplug and plug the phone in the extensions and labels reappear but the problem comes back a couple days later. The problem still occurs after the upgrade. I tried forcing a fw download(post upgrade)and that seems to make the feature label keys stick but the extension still disappears which unplugging the phone brings it back. Anyone know a good place to start on this problem.