IDRAC8 Update to 2.61.60.60 fail

Hello, Dell Poweredge730 IDRAC8 2.50.50.50 --> Upgrade to 2.61.60.60 failed. At OS 2012R2 it failes with "no acces to virtual device" after some minutes. At IDrac update the upload was okay but it is pendig with "downloading" on job queue for several hours. BIOS Update was okay after 5 times to try. racadm racreset & racadm jobque delete -i I have done. Jobqueue is empyt but I can't upgrade. Any ideas? Thanks for help Antwort auf Deutsch geht natürlich auch.