Converting a PDF to Word

I have Adobe Acrobat Pro and need to convert a PDF document to Word.  I have tried doing this by following the below steps:

File

Save As

Microsoft Word

Word 1997-2003 Document

I keep getting the following error message:

"Save As failed to process this document.  No file was created."

I am using a Mac, in case that matters. 

I need to get this done for my employer.  Any help would be greatly appreciated.

Thank you.