I'm trying to follow this example from the documentation about how to pre-populate a drop down menu (http://www.gravityhelp.com/documentation/page/Dynamically_Populating_Drop_Down_Fields).
It's not working and I can't figure out why. I've added the code example to my functions.php file and I've updated the code with the id of my form as instructed.
It doesn't mention it directly in the documentation, but I assume I'm also supposed to add the class 'populate-posts' to the drop down item I want to pre-populate.
I've done all this and it isn't working. Eventually I want to tweak the example a little, but first I'm just trying to reproduce it.
Am I missing a step here?