Quotesometimes I've this problem because of the DNIP of the router because I don't know that the new brand of Windows e.g. 7 & 8 if you give a static IP in the adptaer does not work correctly but there use to be a trick in the modem/router configuration sometimes there is one Tab for assigning same IP to a fixed MAC so you look in your LAN connection for the MAC addresses of the devices you want and assign a fixed IP that when it will be reconnected again in your LAN will always give the same address than before and you won't have problems again with BT and exchanging the IP in case the new one given by the moden/router is different than the previous one.I already did that. But I have 2 LANs behind 2 Routers. And sometimes the laptop/smartphone is part of LAN 1 and sometimes of LAN 2. So I need two possible IPs for the same computer.