Custom Search not returning documents

We created a card as a virtual document allowing our designers to track their invoices, whats paid and what will be paid by project. This was done using a virtual document with a file extension of ".iscinv". That's working fine. I am having trouble on the custom search results though. After building the card and setting the default values I am getting zero results. Any thoughts as to why? Attached are my default values.

Once I run the search, I need the results to be as follows:

Only the files with the ".iscinv" extension

No folders

Since the user can create these files in multiple spots in the project folder structure I want the search to search starting at the root of Projects.

I only want the latest version

What am I missing?

Please help.

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