Is a Roamio pro remote a learning remote? help with Anthem.

Just got an Anthem r720 eceiver, TiVo settings only shows 1 code for mute/volume and it doesn't work. I tried to have the remote learn from the Anthem remote but it doesn't take it, blinks fast several times. I also tried a Pro Glide that I have and it does the same thing.

Are there remotes that the TiVo remote just can't learn?

Thanks

Is a Roamio pro remote a learning remote? help with Anthem.