asterisk users - Feb 2010 - SPA941 WMI not lighting up when natted

I have an a bunch of SPA941 Linksys phones for users in and out of the  
office. When the phones are in the office (and on the same network as  
the asterisk server) the WMI goes on when it should and off when it  
should. But when the phone is on another network and natted it fails  
to do so. The light always stays off. Has anybody had a similar  
problem (and hopefully a resolve)?

Michael Leonetti wrote:
> I have an a bunch of SPA941 Linksys phones for users in and out of the  
> office. When the phones are in the office (and on the same network as  
> the asterisk server) the WMI goes on when it should and off when it  
> should. But when the phone is on another network and natted it fails  
> to do so. The light always stays off. Has anybody had a similar  
> problem (and hopefully a resolve)?
>
>   
Never mind.  It was just me being stupid.  I did not define "mailbox="
in sip.conf.  And it's MWI for "Message Waiting Indicator" not
WMI.  I
was way off on this one.