Dynamically populate dropdown

I'm trying to dynamically populate a dropdown box. Though I eventually hope to pull some values out of the WP DB, right now I can't even get the hooks tutorial working using the default values.

In the dropdown, dynamic population is checked with a parameter name of "your_parameter".

In functions.php, this code exists:

add_filter('gform_field_value_your_parameter', 'my_custom_population_function');
function my_custom_population_function($value){
    return 'boom';
}

And yet, on my form, the "Venue" dropdown (which the parameter is attached to) remains completely empty. What am I doing wrong?

You don't have any values in that drop down to pre-select, which is one way of pre-populating a drop down. The other is a bit more detailed and seems to be the way you will want to go, have you seen this:

http://www.gravityhelp.com/documentation/page/Dynamically_Populating_Drop_Down_Fields

So I've been working away at it, but unfortunately pastie.org is down so I can't see what the completed code would look like in order to make comparisons against mine. Is there any way you could post the full code on pastebin or something for this tutorial?

http://www.gravityhelp.com/documentation/page/Dynamically_Populating_Drop_Down_Fields

Here you go: http://pastebin.com/QNqsScFf