Firmware Upgrade - New firmware could not be uploaded

Hi All,

I have been trying to upgrade the FW on a CR25iNG from SFOS 16.01.3 MR-2 to SFOS_16.05.6 MR-6 but keep getting "New Firmware could not be uploaded. Please refer to online help for possible reasons"

I have tried built in Updater in IE, Chrome & FF to no prevail, also tried file method tried using "HW-SFOS_16.05.6_MR-6.SF210-266.gpg" also tried "HW-SFOS_16.05.7_MR-7.SF210-305.gpg". Same error

Tried CRLoader same problem, just wont go on any help greatly appreciated.

Thanks

Wayne