We are trying to fix an old problem with our Web Forms for Marketers module (I think it is 2.2, but I don’t know how to say it) in Sitecore 6.4.1, which runs the .NET Framework 2.0. I'm having trouble adding a form to an element. I make the assumption that I should use the "Insert Form" button on the presentation tab of my item.
When I click on this button, I get a wizard that works fine until it tells me the following: "Placeholders are not allowed to insert a new form."
Ignoring the problem with the grammar of errors for a moment, I assume that it tells me that there is a prefix for the element that allows it to work with the form. I looked around and thought that maybe the problem in this question was related:
Can't get the Sitecore form to display in the placeholder (Web Forms for Marketers module)
So, I made sure that the form was in my template. It exists now, but an exception is thrown in the logs "the value cannot be zero" when I click "edit" in the "Form" element in the device editor.
I have a Placeholder setup since I read that I need this for some reason. It is called a “form,” and the “Parameters” element is this / content.
Am I missing out on perquisite? Do I need to reinstall the module?