any one out there using bread maker?

i just brought my bread maker (tesco) last week... (sorry ar.. first time user)... tried to fix in the paddle onto the shaft...
after put in.. i dont see the 'click' of secure between the paddle and the shaft whereby the manual said "push the paddle firmly'...

i mean the paddle can be lift up easily.. just like pen cover... any advise? or it is like this....