jQuery Capture Checkbox in UI Dialog Box

Based upon a checkbox, I pop a jquery UI dialog box. The content of the dialog box is dynamically built from a db. Each row has a check box for selection.

I'd like to trigger additional functionality based on clicking one of the check boxes. In the dynamically created table, each check box has a class of "promoteSelect".

Here's the code I have for the jQuery side of things.

// Handle selecting rows from Promotion Sheet Selection Table
$(".promoteSelect").on("change", function() {
    if(this.checked) {
        var env = $("#selectedEnv").val().toUpperCase();
        var promo_key = $(this).val();
        alert(promo_key);
        buildRepoTable(promo_key, env);
    }
});

Any ideas?