I have an excel file in a restricted directory on our web and use an
ASP password verification page to grant access to it (designed by a
third party long gone, of course!).  I try to open it using Internet
Explorer 7 and get the following error message -

***********

The XML page cannot be displayed
Cannot view XML input using style sheet. Please correct the error and
then click the Refresh button, or try again later.

--------------------------------------------------------------------------------

An invalid character was found in text content. Error processing
resource 'http://crm1.hdma.net/eweb/SecureFileSameWindow.a...

*************

The piece of code that handles the file types and such is as follows:

else if (FileName.EndsWith("xls"))
 {
    Response.ContentType = "application/excel";
 }

The excel file opens fine in Firefox.  The excel file was created in
Excel 11, but I have tried saving it down to 2000 and 95 with no luck
- they just open up as text files with no breaks or columns.

Any help would be greatly appreciated!