Remove the battery case door and press the purple pairing button to put your Roku remote in pairing mode. Confirm the LEDs on the front of the remote are blinking continuously. Remove the power cord from your Roku player and re-insert it to restart your Roku player. When your Roku player fully re-starts, it will automatically enter pairing mode and recognize and connect to your Roku game remote.
Here is a link to troubleshooting the remote control if that does not work --> HERE
Did that, now I have the channel selection showing,but the OK button gets no response.
Did you try the steps in the link? --> HERE