Can not select Airport Express remote speakers

I have a first generation Airport Express which works flawlessly with iPad and iPhone. But when I try to select remote speakers from iTunes it deselects the tickbox as soon as I click on it. Usually osx restart helps, but it only lasts until I switch network or loose connectivity to wifi. Expressively inconvenient I have to say. I’m not alone, but it doesn’t mean that there is a straightforward answer out there. Read more