Windows DVD Maker considers dvr-ms files as invalid

I have a Vista Media Center 32-bit, 2-CableCARD media center system. When I
attemped to burn a DVD from a Media Center Files (regular TV. Not HD, not
protected) I get the following message. I get this message for any one of
many recorded TV programs.
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Windows DVD Maker
Add Items
0 files were successfully added.
1 fiel could not be added.
The file <xxx> is not valid or is corrupted.
Where <xxx> is the actual name of the VMC file of type dvr-ms.
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This file type shows in the selection for DVD Maker. This message pops up
within five seconds of choosing the file. It doesn't start doing anything.

I get a similar problem using Windows Movie Maker.
I am using the standard MS Codexs and a Lite-On 2x Blu-ray Burner LH-2B1S SATA