You cannot currently upload directly to JingleMad.
You need to either upload to SoundCloud, 4Shared or similar, then post a link to the uploaded file(s) in your post.
You will need to create a free account first before you can upload to one of these file hosting sites.
I hope that helps :)

Thanks for that Here is Downtown Radio new package for 2012 enjoy.
http://soundcloud.com/patrick-mcghee2/downtown-radio-jingles-2012

The Downtown Radio jingles are in-the-clear on the Ignite website... :O

http://www.ignitejingles.com/audio/53/Downtown-Radio/