Shared review - can't see comments from one reviewer

Hi,

I'm using Adobe Acrobat 10, and after publishing a PDF for shared review using the "Web server folder" option, I can't see comments from one of my reviewers.  Others on my team can see the comments.

I've tried uninstalling and reinstalling Adobe Acrobat 10, and this hasn't solved the issue. 

I tried using an IP address instead of a hostname in my shared folder location, and I haven't been able to get this to work either.

Any thoughts on what might be preventing me from seeing this reviewer's comments?

Thanks,

Liz