I'm new to this group, and the 3 pack of DECO X4300s I just bought. I was having a lot of trouble with my internet dropping 4 or 5 times a day - never longer than 4 or 5 minutes. I decided it was time for an upgrade anyway., replace everything. I upgraded to Optimum's 2 GB fiber service. This came with an XSR150DX MODEM/Router. I had the MODEM/Router bridged to eliminate its router. I followed the setup instructions via the downloaded DECO APP. Everything went smoothly to a point, I got the blinking blue light on the DECO, the APP found it, and I was able to log on. Under the heading "Connect your DECO to the Internet," I selected Dynamic IP. Even though the Dynamic IP is checked on the next screen, the "Done" button is grayed out, forcing me to pick from PPPoE, Static IP, L2TP, PPTP, DS-Lite. At this point I am lost and can go no further with the install/configuration APP. Any help/suggestion would be greatly appreciated. If there is a better place in the forum for this question, let me know.