Show nintex form for BCS list in Forms Listform webpart

[#1]

Hey

I created af BCS list, an used Forms to create a new form for the list.

Now i want to show that form, using the Nintex Forms listform webpart. Im pretty sure it's setup correctly, but the webpart only shows " This function is only avaible for lists, using Nintex forms. ".

Is it not possible to do this, because its a BCS list behind the form ?