I have a Roku 3. It's over 2 years old. Recently when I turn on my tv and go to click on the app I want to watch, my roku will erase all apps. It will direct me to the screen to link my roku account online. When I go through the process, my account isn't recognized and I have to make a new account. Then I have to redownload all my channels. It did this 2 days in a row! Please help.