Help getting back to root

[AllGood]

Ok so the mic on my droid broke and i need to send it back. They said i need to wipe it, no problem its all rooted and all. I can't get it back to stock. I boot to CM RC and do the factory reset it just takes me to a clean JRummy install. I try using DMUpdater and it errors out (sorry no error off hand). I try installing stock from ROM Manager and it errors out as well, i believe it was error 7 (sorry no exact error again) Any other ideas? Would having the SD Card formatted for A2SD cause any issues?

 

[thebizz]

Shouldn't those do the 2.1 sbf that will fix it for you