The SiK Rex does not support sending the required signals. But luckily, you have Remote Buddy to solve the problem ;-)
Please follow these steps:
- Change to the "Hardware"-tab of the Remote Buddy preferences and select the "Built-In Sensor".
- Activate the option "Enable support for multiple remote controls"
- Press any button on your Rex remote. A new entry will appear in the right table.
- Click on "Pair with selected remote" to finish pairing.