Voice-mail not working

Hi
When i try to dial voice mail through message button on ip phone its just ringing to a number i dedicated to voice mail. The same thing happens when the called is busy or does not answer. Call is redirected to voice mail number and it just rings, you cannot leave a message. What seems to be the problem ?
But the mailboxes work. You can record a message on your phone and send it to other phone.
I configured this in UC500 Call manager 4.2

#telephony service
   Voicemail 205
 
 
#ephone-dn 14
  #number 205
  #preference 0
  #no huntstop
 
 
#ephone 1
  #vm-device-id  AN1E4A2600E0000
  #button 1:14
 
I also use Cisco Unity express 3.0 to create users , personal mailboxes ,general mailbox and a public distribution list.
  
Thanks for your help!