If you have a website, that's easiest. Just upload the file to your server, then link to it in your forum post. (I think you may have to have five posts before you can do that.)
If you do not, there are service sites like SoundClick.com and AcidPlanet.com and many others that can host your files. Somewhere on the forum there is a post on this -- but I can never find it... lol. Maybe someone will pitch in here with a link for that post.
And if you're just plain stuck, PM Gary Garritan -- he will generally be very happy to host your file for you.
David, you are a genius
I think i have already uploaded a file, it's a Charlie Parker improvised chorus on "Steeplechase" and it's an attempt to obtain a good and swinging phrasing on the alto sax
comments and advices are very welcome