Suspect your NAS is not fully updated anyway. You can do this straight using v3.7.1 made available today.
Please consider to run the firmware update from the NAS Linux shell. Ensure SSH access is enabled on the NAS, so you can login from your computer (Windows:
puTTY, OS X Terminal app: ä ssh admin@[NAS-IP-address]) using the admin credentials. Then you can enter the commands (the [~] shows just the currecnt directory, the # is the prompt.
Use the manual update as documented here:
http://wiki.qnap.com/wiki/Manually_Updating_FirmwarePlease post the output - just copy and paste the text from the terminal - in case things dont succeed.
Eample - here I start with a direct download of the firmware to the NAS Public share - here an older firmware update for a TS-459. Use the appropriate firmware version, copy the appropriate URL from the download page:
[~] # cd /share/Public
[/share/Public] # wget
http://eu1.qnap.com/Storage/TS-459ProTu ... ld0302.zip...
[/share/Public] # unzip TS-459_3.6.1_Build0302.zip
Archive: TS-459_3.6.1_Build0302.zip
inflating: TS-459_3.6.1_Build0302.img
[/share/Public] # cksum TS-459_3.6.1_Build0302.img
2253686357 150806015 TS-459_3.6.1_Build0302.img <<<< compare the cksum with the information from the download page above!
...
[/share/Public] # mv TS-459_3.6.1_Build0302.img /mnt/HDA_ROOT/update/
[/share/Public] # ln -sf /mnt/HDA_ROOT/update /mnt/update
[/share/Public] # /etc/init.d/update.sh /mnt/HDA_ROOT/update/TS-459_3.6.1_Build0302.img
...
Update Finished.
set cksum [nnnnnnnnnn]
As this looks good we're ready for a reboot:
[/share/Public] # reboot