Have you entered additional sources under System -> Tones & Music?
Alternate Source: Software level = 4.2+ (Not Small Office Edition).
Up to three additional hold music source can be specified. These are wav files loaded and stored in the same way as holdmusic.wav. Note that adding and changing a source can be done using a merge but deleting a source requires a reboot.
· Number
Assigned automatically by the IP Office. The alternate sources are numbered 2, 3 and 4.
· Name: Up to 31 characters
This field is used to associate a name with the alternate source. That name is then used in the Hold Music Source field on Incoming Call Routes and Hunt Groups.
· Source: Up to 31 characters
Defines the name of the wav file that the IP Office should download to use as the alternate source. Prefix the file name with WAV:, for example for the file holdmusic2.wav enter WAV:holdmusic2.wav in IP Office Manager. This defines the file that the IP Office will automatically attempt to load via TFTP following a reboot.