Blog Archive Tags/Buttons Not Working

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Apologies, if I've got this fundamentally wrong, but I presume with my C5 Blog, under Archive, when I click on the Year/Months they are suppose to take me to articles published in those time-frames - if so, mine aren't working, I get no "reaction" from the tags at all and nothing when I click on them - any suggestion, please? I always stipulate the year/date/time function when I publish in "properties".

Please "idiot proof" any replies * 10, as a lot of this stuff is still a bit of mystery - thank you in advance.