PE 1850 PV 745N USB emulation

Hi !

I recently got a problem on my PE 1850 and PV 745n servers,

The "USB Flash drive emulation type" appears blue with "Auto" value and it can't be changed,

I've set USB on with BIOS support and tried to boot with and without my usb drive and tried front and backside, different USB drives, but without success.

If anyone knows how to change it, i'd like to set it to HDD emulation because Auto set it to Floppy.

Thanks !