What version of SWX are you using? I had some underscores in properties in I think it was 2014... And guess what, that did not work at all. I think they fixed it, but check those properties for underscores or special characters, it could be the root of your problem.
I have always had better luck when the actual property name had no spaces. So I would suggest you copy the Description down to the property name and remove the spaces. I'm guessing that's 2014?