Asterisk deletes some voicemails by itself

This is my 4th question on this forum and no one has replied my questions yet.Hope this question will be replied…Anyway i use asterisk and im using odbc storage for voicemails.My problem is some of our voicemails get lost after sometime(somehow asterisk deletes).What can be the reason and how can i solve this?Any help will be really appreciated.

This is the wrong forum. You want the Asterisk Support forum.

However, I don’t believe that Asterisk deletes them, so I suspect there is some housekeeping job on your system that is doing it.

what kinda system can do this?And if so why it chooses voicemail to delete randomly?Im pretty sure that asterisk does this…