Is the authorization code you are entering the code that came with that specific console, or is it from a different console?
The serial code you enter, needs to be the right one for THAT console. There's a code embedded into a hardware chip inside the console, that gets compared to the auth code you enter. If it's not the right one for this console, it will not activate.
If it IS the right one for that console, then I'm not sure what's going on. Worst case, you might have to re-install the OS to make sure nothing got corrupted, and try authorizing again (unless someone else has an easier idea).
Not to peddle "technically illegal" things, but have you considered using one of the available Hacks for your D8B?
In case you don't already have ALL the available plug-ins authorized for the D8B, one nice side-effect would be, that you get all the available plug-ins working.
With the "new" hack, all you have to do, is to replace the MackieOS.exe file on your harddrive, with the "MackieOS.exe" file from this thread:
http://d8bforum.com/phpBB3/viewtopic.ph ... &start=150When using this hack, the D8B usually isn't as finicky about authorization AND you get ALL available plug-ins as a bonus.
I personally still use the "old" hack, that required to replace the control.asc file and unlock all plug-ins with shared codes manually. But if I ever get an "auth" prompt, I'll be replacing the MackieOS.exe with the hacked version... much easier.
Best of luck - also for your health!