More Details button not displaying in the view?

More Details button not displaying in the view?

In the help documentation or on these forums, someone showed me how to create a "More Details" button with the class "zc-formbutton" that displays in a view. It allows you to hide columns in a view, but then easily display that data again when clicking on the More Details button and loading a summary view tied to an ID.

Anyway, I've used this successfully many times before. However, I just copied my old code, pasted it into a new project, but now it's not working. I'm not sure what's different this time or if I've forgotten a step. The buttons are still working in the other applications, just not this new one.

The following is in a formula field on a form:
  1. (("<a class='zc-formbutton' style='padding: 2px 8px;font-size:10px;' href='#View:View_Expenses_More_Details?ID=") + ID) + "&zc_LoadIn=dialog&zc_SecHeader=false'>More Details</a>"

However, when I open the view the button isn't displayed; i.e. I get this:

What am I doing wrong here? Any help is appreciated.