I have shared a file from my Sky Drive web page with someone by sending them an email link allowing them view only access.  I make some amendments to this file on my PC and the Sky Drive app syncs it to my web page.  Now the person I've shared it with can no longer see it, and when I go to the web page I see it is 'not shared'.  Is there some way round this, or do I have to amend the document on my web page (rather defeats the object, I would say)?