The latest firmware for my MN-500 Wireless Router will not install. I was told the resolution to this issue is to match up the subnet masks in the WAN and LAN settings. However, my ISP does not provide a static IP address so I can't assign the subnet mask in the WAN settings of the Base Station Management Tool. Plus, the Base Station Management Tool doesn't allow me to change the subnet mask in the LAN settings. Does anyone know of a work-around?