I don't think you can post the actual file itself on these forums. What people tend to do is to put their files onto their own servers or to put them onto a public site such as Yahoo briefcase (I think) and put a link into your message that points to where you have put the file. I think you may have to pay to share your file on Yahoo but there are other places around that will let you do so.
Cheers,
Sywell-Flyer