When are External Connections not QueryTables?

Hello All,
Some background:
I've been using a perl script(not that it matters much since it's just calling the same DLLs ) for a number of years to auto-magically refresh QueryTables in Excel workbooks via Task Scheduler.
Moving to Office 2013 this stopped working. (the script FYI: link )
It not being my code and interested in a solution that wasn't a blackbox I started digging into it and thought I'd recreate it in C#.

Most of the "how do you refresh connections in excel" questions talk about QueryTable.Refresh...
But after that not working I wrote the below debug code and the output tells me that there aren't actually any QueryTables in the Excel file.

Then I stumbled onto this: Microsoft.Office.Interop.Excel.WorkbookConnection ( link ) link2

So I guess my question is, what did I do that the connections aren't seen as QueryTables anymore and how to do I fix them? (They do look like QueryTables...ie, It's an external connection that feeds to a Table)

Also, more generally , is there something fundamental that I'm missing?

Many Thanks and sorry for the overly long background/question.
Regards,
Alex

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This works though

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