2 回答
Make sure that the Office MIME types are registered on the server that is not working
http://technet.microsoft.com/en-us/library/ee309278(v=office.12).aspx
Thanks, for the replies they are greatly appreciated. It turns out that the problem was not having that for the file to be send and displayed correctly the buffering (Buffer = "true") had to be set in the page directive. The headers are cleared, page created in it's entirety and then pushed to the user. This was a .net project that pumps results from our db in .xlsx to mobile devices. A little (or a big) pain but now it works.