you need to install all of the files needed for the xbox to run. I'd start by using XBOXHDM to create a new xbox drive, and putting evox etc onto the c: with all of the files needed for the original dash.
Problem is I've probably destroyed the original dashboard files and have no clue where to find those, willing to retry the softmod and forget about the chips since they where dead cheap but would still need a decent way to restore the dashÂ
grab a copy of Hexen or AID and they have a copy of all the dash files on them.