I've been doing some work on a custom locale, i.e. editing the xml files, and in order for the 7940 to load the new file, I had to restart the TFTP server and reset the phone to factory defaults. Now this is for CallManager, not CME, but it's worth a try. At least in resetting the phones to factory defaults. Basically, settings, 3 for network settings, **# to unlock, 33 and yes then save (i think 33 is erase config).
Are you getting this error “Installer User Interface Mode Not Supported. The installer cannot run in this UI mode. To specify the interface mode, use the -i command-line option, followed by the UI mode identifier. The value UI mode identifiers...
The below trick might come handy when you have to add a new node to a cluster but you don't have or is unsure of the security password for the publisher. This procedure has been around for ages.
1) Login into the CLI of the Publisher.