SIMetrix: Passing a value from a drop down menu in to a schematic

I'm using SIMetrix/SIMPLIS Elements circuit simulation software to try and model a resistor who's value can be chosen from a drop down menu. I can make a symbol, make a circuit model (as a schematic which I export to a .mod) and then link the two and place the part. I can then double click on the part to get a drop down menu of different resistance values. However, I cannot get that user choice to be passed in to the resistor inside the model for its resistance.

 

Has anyone had luck creating a new part and letting the user choose values from a drop down menu? I've followed the manual and the examples as closely as possible but I must have a syntax error or something missing. I need help! The command shell complains that MY_RES is an unknown parameter. It is the resistance of the resistor and the value which is supposed to be chosen from the drop down menu on the symbol.

 

 

The descriptions for each image which I included can be seen by hovering the mouse over the attached image (at least in Firefox).