title: can't open excel file from browser
body: <p>only on my pc i have message when try to open xlsx file in excel</p>
  
  <blockquote>
    <p>To open this book, your computer must have the version of Microsoft Excel and Web browser with support for open files directly from Excel.</p>
  </blockquote>
  
  <p>i have installed ms office 2010 pro+ (including excel), i was try make this action from firefox 3.6.4-3.6.6 and internet explorer 8, any other pc in network can open successfully and software ion this pc's is same.</p>