[Freeswitch-users] mod_voicemail and non_numeric id

Hi All I use non numeric id at user configuration(<user id="mike" >). All my dial plans in lua. *Problem :* when a user logged into his voicemail and try forward a message to another user's voicemail, mod_voicemail do not understand the extension number and always say invalid. Is there any way map extension number to user id , so that mod_voicemail can get the non_numeric id and forward the voicemail? Thanks Lloyd