I do not see an Xbox live logo at the song database. I see a Wii Ps3 and PSh but a blank logo under DL for every song. It could be a bug my PC is doing. The Wii PS3 and PSh downloads work just fine but if I click on the song name or the blank logo under DL it saves as "all files" leaving me nothing to extract at all.
The songs I was looking to download were..
About That Life by ATTILA
Dez Moines by The Devil Wears Prada
Demon(s) by Darkest Hour
Telos by Between The Buried and Me
The Air That I Breathe by All That Remains
Rudolph The Red-Nosed Reindeer by I Declare War
Still Fly by The Devil Wears Prada
For most songs, clicking the XBox logo in the song list should take you straight to the download page hosted by MediaFire, DropBox or whatever file sharing site, for that song. Clicking the song's name instead, and then using the "Download for XBox 360" link on the following page, should take you to the same place. From there, downloading the RB3CON should be self-explanatory.
If this isn't what you're seeing, let us know what song(s) you are trying to download.