I am having a issue with 2 5621 IP Phones with VPN enabled to a Kentrox, I setup the phones and connected them remotely via the vpn, worked fine in the states but when they plugged them into the location in canada we get discover 10.93.0.7 on one and the other has an error "gate keeper is empty". we have 2 other phones in canada and they work fine, all these phones are at different locations in canada, any ideas??