clickhappy

I purchased a Manfrotto Monopod 290 some years back but it has rarely been used as I just cannot seem to be able to connect the thread to my canon camera. On and off I make repeated attempts to connect but it never seems to work. I wonder if there is a fault or damage but I cannot see any damage but the thread doesn't appear to protrude very much making it impossible to get any grip. I wonder if there is any kind of adapter available to enable me to use my monopod ? So far it's been one big frustration and complete waste of money. Any advice on this problem would be greatly appreciated