Digant
Write to Uni-Trend customer services and request the latest firmware for your version of the UTI-260b. Give them the information shown on your camera information page and the serial number. Using some random firmware version from the internet in your camera can easily result in bricking it. You need the correct firmware version for your hardware platform version.
Unless you have a really good reason to update your cameras firmware, it is best not to as there is a very real risk associated with updating these Uni-T cameras.
Fraser