No problem here. I was just a bit confused because I saw that you were online but no response here. I'll delete the negative feedback on your marketplace item - don't worry.
I'm using a custom theme, yeah - but it's not working with the default theme either. So, to clearify the way to get this app working:
Create a few fields
Group them as a container
Assign the container to a forum
Create a new topic and fill out those new fields
The fields will be added to the post after creating the post?
Is this correct?