yntaxEditor context menu option disabled

I'm adding an option to a WPF Syntax Editor context menu. But the option appears disabled even after set the IsEnable property to true.

MenuItem menuItem = new MenuItem();
menuItem .Header = "New option";
menuItem .Command = new EditActionCommand("New option", new OptionImplementation());
menuItem .CommandTarget = textBox;
menuItem .IsEnabled = true;
menu.Items.Add(menuItem);



internal class OptionImplementation: EditActionBase
{
    public override bool CanExecute(IEditorView view)
    {
        return true;
    }

    public override void Execute(IEditorView view)
    {
        // Implementation
    }
}

I have another menu items added in the same way that are enabled. What I'm missing? Thank you.