 <p>There's one more issue you might need to address if you are using the <strong>Windows 2008 Server</strong> with <strong>IIS7</strong>. The server might report the following error:</p> <p><em>Microsoft Office Excel cannot access the file 'c:\temp\test.xls'. There are several possible reasons:</em></p> <ul> <li><em>The file name or path does not exist.</em></li> <li><em>The file is being used by another program.</em></li> <li><em>The workbook you are trying to save has the same name as a currently open workbook.</em></li> </ul> <p>The solution is posted here (look for the text posted by user Ogawa): <a href="http://social.msdn.microsoft.com/Forums/en-US/innovateonoffice/thread/b81a3c4e-62db-488b-af06-44421818ef91?prof=required" rel="nofollow noreferrer">http://social.msdn.microsoft.com/Forums/en-US/innovateonoffice/thread/b81a3c4e-62db-488b-af06-44421818ef91?prof=required</a></p>