How do I use $PRPSHEET in EPDM Variables

I am trying to setup our system so that the drawing data cards will auto populate based on data from the models. This seemed straight forward from other posts that I have seen, but it isn't working for some reason. The first screen shot is of the variable "Test_ECN" which is intended to populate with the variable "ECN No" that is contained in the model. The 2nd screen shot shows that the model indeed has the custom property ECN No filled out. The 3rd screen shot shows that the drawing isn't updating. I'm hoping someone with a trained eye can quickly see where I've gone wrong.

 

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