[Total Newbie Question] Declaring IntegerProperty causes custom block to unregistered

BooleanProperty does work so I thought IntegerProperty works the same way. Is there something I am missing? This is how I tried using it:

public static final IntegerProperty P_COUNT = IntegerProperty.create("pCo",0,5);

public CCCBlock(Properties properties) { super(properties); this.registerDefaultState(this.defaultBlockState().setValue(P_COUNT, 0)); }

protected void createBlockStateDefinition(StateDefinition.Builder<Block, BlockState> pBuilder) { pBuilder.add(P_COUNT); }