I have an 880 also that I need to program a ROKU Netflix box. What type of device did you set it up as and what model # did you use? Did you have to program the keys manually? If so how did you program the play/pause keys , the forward scan key and the home key??
I have a 550 but it should work the same way - select 'PVR' under Video Recorder as the device, select Roku under manufacturer and enter N-1000 as model.
Now when you select that device the buttons will work properly. It will take a little more work to make the device part of an activity.