Shimano MF-TZ21 TOURNEY freewheel

[MAGICPIE3FOCUSPOWER]

I have this freewheel: Shimano MF-TZ21 TOURNEY.

But I can't get running smooth.
When pedaling you can feel the chain resistance (clicking).

I am using :

Deore 48T chainring (9 speed chainring).
KMC 8 speed narrow Z chain.
Deore derailer.

Anyone has any tips to get this running smooth without any reistance (clicking).

Thanks in advance!