Fotigate VPN Site to Site Tunnel becomes unresponsive

Hi,

We've configured the site to site connection from our Fortigate 3016B.

Phase1, and 2 connect.

Azure range:

10.1.0.0/16

Local Range:

172.16.4.0/24

192.168.0.0/16

Once the tunnel is established we will get periodic comm's to ssh to a linux VM, but then the traffic drops away.

I noticed this question posted:

http://social.msdn.microsoft.com/Forums/windowsazure/en-US/8a00ce6a-584f-489f-a7dd-94bca4445a73/vpn-tunnel-timeouts?forum=WAVirtualMachinesVirtualNetwork

My question is, if our local network is 192.168.0.0/16, would that mean the Azure network would also need to be 192.168.0.0/16? This doesn't make sense to me, but we have this issue currently of the tunnel that is unstable and unusable.