I rec'd a new modem mod #RM5110 a few weeks ago. I thought I could install but can't. It doesn't set up like previous model. I have 2 separate accounts and I don't know if this was for the 50GB account or the basic account. I'm experiencing difficulty with downloading, playing back and recording movies either on demand or pre-recorded. I'm also having problems accessing the internet on my iphone and PC using the 50gb account. I've reset the current modem numerous times as well as the Direct TV box but nothing resolves the issue. Obviously, I need some help.