Clock Setting problems

Hi everyone, I have just become the new owner of a Jaguar X Type 2.2 diesel, manual 6 speed gears. It’s a 2009 with only 63,000 on the clock in excellent condition BUT I can’t set the clock? I have tried all of the various suggestions and even followed several Youtube videos to no avail… I can get as far as the the word CLOCK SET and then the hours flashing but then nothing. It doesn’t matter what buttons or switches I press nothing happens, and then after about 20 seconds the Radio comes back on. Has anyone got any ideas? Many Thanks, look forward to your help. Les