You need to specify a IR transmitter device in the PK_Device field. So if you have a USB-UIRT, you need to add the Device ID of the USB-UIRT device in that field. Do that and reload the router, and I think it should work.
You can test the device by going to the advanced device screen for the RAS and click 'Send command to device'. There you can send different commands manually.
If you have any more problems, view the log for the RAS device, either through the advanced device screen('view errors in log' or 'view whole log') or in the console.
Btw. what is the model number of your AirCon? I suppose it'd be a good idea to keep track of which devices work with this template. For now I just assumed all RAS devices use the same IR code, which probably is true..