[Asterisk-Users] Voicemail

[MDM]

I am trying to setup voicemail for my iaxy device, however,
i cannot get it to work voicemail never picks up. Below is my config.
Am i doing anything wrong here

 From my Extensions.conf file
	exten => 7403,1,Dial(IAX2/u7403/s)
	exten => 7403,2,Voicemail(u7403)
	exten => 7403,102,Voicemail(b7403)
	exten => 7403,103,Hangup

 From my voicemail.conf
	[telx.com]
	7001 => 7001
	7002 => 7002
	7402 => 7403