After my MCU upgrade, I can't connect my car to my wifi. I get a message in car "Unable to obtain IP address. Please check DHCP server settings. I believe the problem is that the Netgear EX 7000 interferes with the DHCP functioning of the DSL Modem/Router. I have only Mac stuff and therefore can't get to change the Netgear's settings. Is there a good range extender that can play nicely with an Actiontec 3260 and my Tesla? Or a way to use a MacBook Pro to change the settings in the Netgear EX 7000 that I already own?