Asterisk voicemail error: file.c: Unable to open format wav

After upgrading asterisk to latest version on a new server our voicemail gets below error:

[2012-05-20 09:21:53] WARNING[25083] format_wav.c: Not a wav file 49

[2012-05-20 09:21:53] WARNING[25083] file.c: Unable to open format wav

[2012-05-20 09:21:53] WARNING[25083] file.c: Unable to open /var/spool/asterisk/voicemail/default/9001/unavail (format 0x4 (ulaw)): No such file or directory

To resolve this we had to fix the database name and table in voicemail.conf to make sure it is using odbc configuration same as our res_config