Flashed stock rom after that no baseband/imei .... topic

hi guys,

ill have a little prob. i flashed my note 3 with a stock firmware it was a demo unit, but after that i have no baseband more, imei is gone and in the phone info app are no modem data more.

i hope that anyone can help me.

a few data about it:

n900xgsmh
n9005-4g
csc before: PAP
csc now: DBT

android 4.4.2

ps: ill flashed now feeld 1000 modems but no one works -.-