Need help getting back to stock and updating to GB...

[mnhockeydude]

So I am trying to updated my DX to GB and return to stock. I flashed a sbf to return my phone to stock, which it did, it looks like the 2.2 froyo however, I attempted to download the system update which worked fine, but after I try to install it reboots me back to clockmod where I press reboot which it does then it comes up saying update installation failed. I tried using maderstock340 to remove my root and clockmod and return to stock without the clock mod but it wont download the file. I am a little bit of a newb to this so any help would be appreciated!