I have a system with a Microsoft ppi board and 2 local pc's. The problem is that I cannot get the Crestron USB-EXT-DM's to pair over the network. I can connect them directly together as an extender, but as soon as I hook them through the dhcp router, nothing. I have used the module in simple windows and addressed the local unit in the pairing section..... nothing. Any hints or input would be appreciated.