IIS 6.0 HTTP Compression Problem

Hi
I have one ASP page (ExcelReport.asp) with Response.ContentType =
"application/vnd.ms-excel" and Response.AddHeader "Content-Disposition",
"filename=ExcelReport.xls" to export to excel. The website is hosted on Win
2003 server with IIS 6.0.When the user opens this page it displays the
filedownload dialog box with file name "ExcelReport.xls" and user can save it
as an excel file.
The problem is when the HTTP Compression for dynamic files (compress
application files) is turned on, on IIS, the files name extension (.xls) is
not coming while trying to download. It comes as ExcelReport.asp and on
saving gets saved as .asp.
This issue happens with IE 5.5 (SP2). But works fine if the HTTP
Compression for dynamic files is turned off. Is this an issue with IIS and
HTTP Compression?
Can any one help on this ?


Thanks in advance
arunps