If your remote no longer controls your docked iPod®:
Remove the iPod® or iPhone® from the dock and then redock it. Undock the iPod® or iPhone® and wait 60 seconds, then try to redock it to ensure a secure connection to the connector. You may need to try this procedure a few times
Make sure the native audio program is running. An iPod® will only pass remote commands to its internal player, not to any third-party application it may be running. Pressing play/pause while streaming audio from Spotify, for example, may cause the iPod® to switch over to its own music and start playing
Reset the iPod® or iPhone®. The iPod® or iPhone® may have malfunctioned and might need to be reset. For more information, visit the Apple® Support site
Note: Resetting the iPod® will return the Backlight Timer, Brightness, EQ, Shuffle and Repeat functions to their default settings.