在服务器上发布excel interop不起作用

Question

本地工作很好：

Thread.CurrentThread.CurrentCulture = new CultureInfo("en-US");

 Application excel = null;
 Workbook wb = null;

 excel = new Application();
 excel.Visible = false;
 excel.DisplayAlerts = false;
 excel.AlertBeforeOverwriting = false;

 wb = excel.Workbooks.Open(Server.MapPath(fileName), Type.Missing, false, 
                    Type.Missing, Type.Missing, Type.Missing,
                    Type.Missing, Type.Missing, Type.Missing,
                    Type.Missing, Type.Missing, Type.Missing,
                    Type.Missing, Type.Missing, Type.Missing);

wb.Save();

wb.Close(false, null, null);

excel.Quit();

在服务器Windows 7 Ultimate x64上发布后，我遇到了这个问题：

Microsoft Office Excel cannot access the file: ///
There are several possible reasons: • The file name or path does not exist. • The file is being used by another program. • The workbook you are trying to save has the same name as a currently open workbook.

如何解决这个问题：