I made a mob with Blaze AI and he drops a blaze rod instead of my custom item ?!

So I made a mob that is similar to the Blaze with the Blaze AI but the mob drops a blaze rod instead of my custom drop that I have assigned.

I checked the code and I can't understand why it keeps dropping the bad item. Here is the drops line :

@Override
        protected Item getDropItem() {
            return new ItemStack(MCreatorBlowzePowder.block, (int) (1)).getItem();
        }

So could someone help me to find why that doesn't work ? Thanks.