i have AN1020-25U modem(with usb port) and it is giving me a prob that the iptv(PCTV) works on it for 1-2 hours in a day and then suddenly stops working and the next day it's working again for 1-2 hours!whereas iptv on the older AN1020-25(without usb port) works flawlessly!.i just want to opt for the 25U modem because it has a lot of good features! can someone help!.