Hey guys there are lots of posts on how to do this but people are still having trouble so here are some links to get you started.
How to add your Songs Click this link Upload Songs Important these must be your Own songs, MP3 files should be no larger than 15mb
How to add your DJ Mix Tapes There are lots of ways of doing this, you can embed Youtube Videos, SoundCloud, MixCloud mixes directly into the forum pages. see these guides How to SoundCloud How to Youtube How to MixCloud
You can also use fileshare sites then post the link into the forum http://www.hulkshare.com
Hope this helps keep posting!