Thanks for the post.
We do not have enough details from your original message to make an effective suggestion. Could you tell us more about the issue you're experiencing?
Furthermore, if your remote doesn't have a pairing button, you might have the Roku simple remote. Our simple remote uses invisible infrared (IR) light to transmit button presses a short distance. It must be pointed directly at the Roku device and there must be nothing blocking the signal from traveling to the front of that device, where the IR receiver is located.
We look forward to hearing from you soon.
All the best,
Roku Forum Moderator