Asterisk voicemail MWI

-I have asterisk 1.8.7
-I have configured the voicemail to store messages in file system storage but voicemail users are stored in ODBC database interface.

My problem now when i set “allowsubscribe=yes” in sip.conf, i receive too many warnings like:

-my configuration:
1)extconfig.conf:

[settings] sipusers => odbc,asterisk,sipusers sippeers => odbc,asterisk,sipusers voicemail => odbc,asterisk,vmusers

2)res_odbc.conf

[asterisk]
enabled => yes
dsn => MySQL-asterisk
username => xxxxxxx 
password => xxxxxxx 
pre-connect => yes

please help.