Darkness Enthroned Fine Belt (shield) + Ox Idol = no block chance

Hello,

As description said i got a SHIELD Darkness Enthroned Fine Belt and put 2 Ox idols in , it says i get block chance on the belt , but on the block tooltip i dont get a diffrence when put on.

P.S I put ox idol in shield, it works there.But not in belt.

Regards