Word .doc import broken on OpenOffice files

I’m on Scrivener on Windows 7. I just tried to import a directory full of .txt and .doc files. The .txt files worked; the .doc files gave “unsupported format”. When I reset to use the Microsoft converters, the files still wouldn’t open.

All of the files were created in OpenOffice, not Word – is it possible that the converters can’t handle OpenOffice .doc files? I opened them in WordPad just to check, and they opened fine.