Properties in vb.net, need help

Question

in a class, i wrote this code 

 Public Property Changeaheight() As Integer

        Get

            Return newValue

        End Get

        Set(ByVal value As Integer)

            newValue = value

        End Set

    End Property

and int shows me an error int the newValue parameter. this kind of error: 

newValue' is not declared. It may be inaccessible due to its protection level