OLE DB Source Editor doesn't see my Excel named ranges

I have a Connection manager to an Excel workbook.
I've set it up as Microsoft.Jet.OLEDB.4.0  Excel 8.0;HDR=No
When I create the DataFlow OLE DB source, the Name of Table or View dropdown shows only 3 items:
Resources$   Resources$_  and Volumes$_
My workbook has 2 tabs (Resources and Volumes; Volumes is hidden), two named ranges of the same name (Resources and Volumes)  and a bunch of other named ranges.
Why does the drop down only show these three things, and only the first one (the first tab Resources$) actually works.
The other two give a nasty message (0xC02020E8 Microsoft.SqlServer.DTSPipelineWrap)

Why can't I see my named ranges?

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New user to 2005