QUOTE(fallenangle @ Jul 17 2012, 09:07 PM)
It's not clear to me - are you getting an Error 21 when you now boot the Xbox or just when you try to access the MS dash?
Have you tried reconnecting your original SD cables?
Thanks for helping. I fixed it on my own. Fallenangle, the error message came when I tried to load the original dash within XBMC. It even came up with my SD cables. What I did was I went into Ndure (that's what I modded with) and I found a disc tray open boot option for the original MS Dash. I selected it, got in, enabled HD and I was good to go.