CP6015 - Image transfer Roller - Replaced 2 times but still shows Replace Message

We got 1 CP6015 with an empty Image Transfer Roller, After Replacment it still shows error

Steps we do

1. Replace Image Roller CB459A
2. Coldstart - Still shows Message
3. Firmware Update to Latest Version 2014.01
4. Coldstart - Still shows Message
5. Multiple reseat retrys
6. put another new CB459A in
7. Still same error Message
8. tryed NVRAM Reset
9. Still same errror Message
10. Now we are stuck, and wasted 2 Image Transfer Rollers :-(

Before you ask, we Replaced all Parts with Genuine HP Parts, never put anything else in our HP Fleet. 

I could not found anywhere a menüpoint or something to Reset the Image Transfer Roller.

Thx in Advance for any Ideas