Post-init cnf creation is in progress, pls re-issue this command later

My environment: Cisco ISR 2821 router, IOS 12.4(24)T Advanced Enterprise
CME version: 7.1.0.1
If you see this error message when you issue the “create cnf-file” command, very likely that you have missed a configuration parameters under “telephony-service”
Make sure you have:
ip source-address 1.1.1.1 port 2000
under your telephony-service.
You’ll also need to synchronize you router hardware clock with the NTP source before issue the “create cnf-file” command.

An iPhone app for CME Config Generation:
http://itunes.apple.com/us/app/cme-config-generator/id453025819?ls=1&mt=8