[Asterisk-Users] voicemail&ilbc

[Altus Snyman]

Good day all
We have the Grandstream phone.We configured sip.conf to use libc and the 
phone as well.But now,where in alaw it worked,if you enter the voicemail 
it doesnot recognize the number you type in,in other workds,if it asks 
for mailbox and I type in 405 and check asterisk it says no mailbox 
entered using CID.
If I se the password to nothing it logs on but the if I press 1 or 0 or 
whatever it does not se the the number I typed in.
Please help
Thanks
Altus