BIOS updating failed

Good day 

i have spent the whole day trying to update a bios of my R710 with no luck. i have first tried to do the FTP download via the "F10" option. it finds the updates but then says that its not an authorized dell update .... this is from the DELL FTP server .. i downloaded and installed the Dell repository manager, got the files and exported them to the SUU (32bit) placed on USB, again , it picks up the files and when trying to update the bios and life cycle controller it says they same that its not an authorized dell update.

i have tried about everything ... any help would be appreciated