Import of Adobe PDF causes "FILE IS CORRUPT"

I"ve had this happen a lot in X5, but this has been the first episode with X6. Any ideas?  Prevous work arounds have involved opeining  Adobe CS4 Acrobat Pro, resaving it as a PDF, then it would import.... but no luck this time - same corrupt warning no matter how I resave it.  

any ideas on what it could be - Corel or the PDF file itself?    I've tried importing all pages (3) and just one page... no luck.

Help...

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