Actually, it looks like you've tried to import the template from the working folder. When TandemVids processes a customer, it copies the selected template to the working folder and populates the empty events with the source media. The source media is cleared after each customer is processed so it's missing when you try to import it. You can't import the template from the working folder. It's a dynamic file that changes for every customer.
I noticed you're using Vegas 10 so the template I supplied won't work but it looks like you already have a semi completed template. Import it from the original location, not the working folder. If you can't find the original template, replace the offline events with empty events.
Mick