The firmware currently installed is not quite a year old and I did not see any limitation that precludes this version from being able to take the new one using its normal settings.
The path that costwise provided is correct and the protocol type should be HTTP. You should also check the settings for Always check for firmware and then once set, reboot the phone.
I am assuming that the phone has not been provisioned and that the firmware location as was provided remains intact. If not, then do a factory reset, remove the provisioning file from whatever device may have it and then start anew.
The phone should restart whereupon it will boot up completely, obtain an IP and then show the default screen. A short while later it will check behind the scenes to see if a new version exists and if so, it may present a message about a new firmware being found, update? Y/N? (it may not be on this model, but it on the higher end). In any event, if the message is present, answer Yes. If not the phone will simply start its update sequence which will present a blank screen with only the status of how the update is progressing and will complete and reboot back to the home screen when complete.
If this fails, then you may need to try and download the firmware and set it up on a TFTP server and point the phone to same using TFTP for the update method.