For starters, please take a look at our How to Program Sideclick tutorial to make sure you are clear on the programming process. Next, let's make sure the remote you are using is an IR remote which is required to program Sideclick. How do I know if my remote is an IR remote?
If you have the programming process in place and have determined that your remote you are trying to learn from is indeed IR, one troubleshooting tip is to replace the batteries in your device's remote. Sometimes even if the batteries are strong enough to control your device, they are too weak to program Sideclick. A quick battery swap may solve any issues.
Lastly, try and program Sideclick using a different device remote such as a different TV in the house just so we can make sure it's a problem with the Sideclick and not a compatibility issue with the device you are using.
Thank you for giving us the opportunity to help you troubleshoot. Please let us know if this information did not solve your problem. You can reach us at firstname.lastname@example.org.