CFSpreadsheet can't save and open excel file on Internet Explorer 8

I'm having a problem with my cfspreadsheet. I try to create an excel file which will trigger the browser to download and open the file created. Its work fine in other browser But I'm having a problem to save and open the file with IE 8. The file successfully create in the directory but fail to call the file create to download. It only can be done if I put a direct link to open the excel file. This is the code that I use to trigger the file to save and open. Does anyone knows the other way?

<cfheader name="Content-Disposition" value="inline; filename=file.xls"> 

<cfcontent type="application/vnd.ms-excel" file="template\excel\file.xls">