@lorilynnlamp-
My first Roku had a dedicated channel button for Rdio. But the Rdio channel shut down several years ago. If your remote is an older one with a Rdio button, make sure it isn't stuck in a depressed position.
Roku Community Streaming Expert
I am not a Roku employee, only a user like you. Please, no support questions via private message -- post them publicly to the Community where others may benefit as well.
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Ultra 4800 | Streaming Stick 4K+ 3821 | TCL Roku TV 43S245/C107X