[Serusers] VoiceMail MWI

Hi all, I am newbie to kamailio and asterisk... I am using ... *Asterisk 1.6.0.5 on CentOS 5* (172.18.100.65) *kamailio 1.5.0-notls on CentOS 5* (172.16.0.10) I am successfully registered my sip phone with kamailio server and call were flow from one number to another. I have multiple Asterisk Server and one Kamailio server... when user dial number, but unable to reach he/she can put voicemail for that user on asterisk server where he/she can called... After a few minutes (say 10 minutes) i will execute one script in cron (every asterisk server) that will find voice mail from and put it on centeralized voicemail server, which is same as above configuration... How can i use MWI ... to indicate user that he/she has voicemaili in his/her mailbox... What changes should be requiered at kamailio site as well as asterisk side... Plz help me out. Thanks in advance -- Regards, Chandrakant Solanki