Try removing the command "cnf-file location flash:" under telephony-service. The default is store the config files in memory.
Do you have enough space free on the router flash, and is it inserted in the router all the way? Can you save the running config to the flash (see if new files can be saved, etc on the flash). Is there a write-protect switch on the flash you are using maybe?
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.